34 comments

  • renegade-otter 1 minute ago
    Didn't ALL Waymos at once pulled over recently because it started raining?

    This ain't Arizona - Atlanta has REAL weather.

  • dhbradshaw 2 hours ago
    To me this doesn't seem like a disaster but just the kind of thing that happens as you role out a service and expose it to new challenges.

    Presumably they haven't had the chance to do a lot of flood training but now they have that chance.

    The huge advantage they have over people in general is that ideally if they figure this out then it will stay figured out. Then they can slowly role out and watch for the next hitches from new situations.

    • grumbel 2 hours ago
      I am a little worried that this is still a problem after 20 years. Don't they have simulators to test every weird and unexpected road condition offline? And flooded roads aren't exactly an unusual event to begin with.
      • burnte 1 hour ago
        In ATL this happens often enough that it's not a shock when it happens, we have lots of drainage problems here. I agree that I would have assumed Waymo had tested in events like this, but clearly not. So what I can say is running in ATL is a great test case for these events, and also the people who live here don't do a better job than Waymo did. There were dozens of people who ruined their cars yesterday trying to drive through deep water.
        • Muromec 24 minutes ago
          As much as one could expect waymo to train on it, one could also expect a functioning city to not have flooded streets
          • bluGill 7 minutes ago
            Why?

            Functioning cities often shutdown for a day here or there for weather. I live in a northern city where we laugh at southern cities for shutting down for 1 inch of snow - but it is the right thing for them because it doesn't happen enough to be worth dealing with. If my city shutdown for 6 inches of snow we would be shutdown unacceptably often so we instead have higher taxes to pay for all the infrastructure needed to deal with snow (though honestly this isn't much $ in the total budget).

            Which is to say cities need to figure out what is the best use of their efforts/money. It is wrong to fault Atlanta for not dealing with this. If you live there you as a voter should learn all the pros and cons (I suspect there are some unexpected environmental ones) and consider if you should vote for a change or just deal with it. The rest of us won't don't live there though should keep our fingers out of their local issues.

          • ethbr1 11 minutes ago
            That's like saying one could expect New Orleans not to flood during hurricanes.

            There are problems.

            There is money you can throw at those problems.

            And there are some problems that are rare & low impact enough that it's not worth throwing money at them.

            See also: keeping snowplows in Atlanta.

            • namibj 0 minutes ago
              Yeah you can start by not building _more_ in the flood plain. And if you do, then don't build architecture that is incapable of just accepting the temporarily higher ground water. We know how to basement just make the basement high enough to tower over the flood. Oh, no cheap ground-level storefront windows? Welp, guess those have to be elevated above sufficiently voluminous drainage channels (the former streets).
        • QuercusMax 1 hour ago
          We had a story in the news this week about a Cybertruck driver who thought his Elonmobile was a boat because it has "wade mode" and deliberately drove into a lake! Humans are very stupid when it comes to driving through standing water!
      • krackers 2 hours ago
        They can simulate "driving out of a raging fire" but not a flooded street? This seems like an admission that the fancy "world model simulation" doesn't actually mean much

        https://waymo.com/blog/2026/02/the-waymo-world-model-a-new-f...

        • brookst 1 hour ago
          IMO there is a lot of daylight between “is not perfectly capable of simulating all situations and always used perfectly to the full capabilities of the system” and “doesn’t mean much”.
      • marcosdumay 1 hour ago
        It can just mean that nobody though about flooded streets, what's way more reasonable than it seems because of the birthday paradox.

        But that also means they need a long time to adapt to a new situation. That may be very bad depending on how fine grained a situation is defined, or it may mean nothing and in a few months they'll be back without problems.

        • thrownthatway 49 minutes ago
          > It can just mean that nobody though about flooded streets

          No one who works for them thought of flooded roads.

          That’s reassuring.

      • EA-3167 31 minutes ago
        It’s been clear for a while to anyone without money riding on this that the relatively “easy” part fooled a lot of people into assuming that the last push to full self driving wouldn’t be radically greater challenge.
      • outside2344 2 hours ago
        The fact that they aren't a usual event is probably exactly the challenge here.
        • antonymoose 1 hour ago
          It may not be usual in Atlanta itself, but living on the Southeastern coast within a mile or two of the water, for 30+ years, it’s a surprisingly common occurrence. I’ve got old photos around of kayaking through downtown Charleston during college, for instance, where the street flooding is not only usual but a many times per season occurrence. Lots of seaside areas have the same issue.
        • trollbridge 1 hour ago
          I’ve lived in a place where it flooded every year or two. It floods regularly where I live now too.

          Locals know which roads to avoid and not to drive into a flood.

        • thrownthatway 47 minutes ago
          Floods aren’t a usual even.

          Have you ever even been outside?

    • themafia 2 hours ago
      If your premise is "robotaxis are so much better than human drivers" then this is almost a disaster. This is only the 10th city they've deployed to, all in the south, and nowhere there's significantly inclement weather. It does not bode well for their expansion plans.
      • bluGill 4 minutes ago
        Human drivers are very very bad. Being better than humans is a low bar with plenty of room to be bad as well.
      • overfeed 2 hours ago
        > This is only the 10th city they've deployed to, all in the south, and nowhere there's significantly inclement weather

        You may be relieved to hear Waymo is rolling out to Portland, Oregon. It's not in the south, and with over 150 rainy days per year, it ranks among the rainiest US cities.

        • kibwen 1 hour ago
          Rain is one thing, but despite the rain Oregon is almost dead-last among all the states in terms of flood risk. It gets constant drizzles, not sporadic deluges.
        • autoexec 1 hour ago
          I'll be relieved when I hear that they did it without killing anyone. Considering they didn't bother to work out how to handle floods before they put people's lives at risk everywhere else, it's not all that reassuring that they're now going to YOLO it in Portland
          • WorkerBee28474 42 minutes ago
            Nobody has ever been killed by a Waymo. You're being dramatic.
      • Retric 2 hours ago
        Better is an arbitrary statement. By number of jobs robots lose, by number of sexual assaults by taxi drivers they win. Pick the wights for very factors and you can select anything as the best in category.

        Safer, cheaper, etc are less arbitrary.

      • mixdup 1 hour ago
        I'm not sure why you would say there's no significant inclement weather in Atlanta. The flooding this week was not super common, but also not unheard of. It rains here a LOT in the summer
        • burnte 1 hour ago
          Agreed, this happens here every year, it's why we built O4W park the way it is, and built many other drainage structures similarly. We have a real runoff problem. Waymo picked a great city to train the cars on weird weather and weirder roads. :D
      • skybrian 2 hours ago
        It's a delay. The question is how long? Doesn't seem unfixable.
        • themafia 2 hours ago
          I would assume that after the very first instance you would start moving to fix it. To be in a position where you have to roll back your plans doesn't seem like a simple "delay."

          The question is: why haven't you fixed this already?

          • overfeed 2 hours ago
            > The question is: why haven't you fixed this already?

            Since you're of the opinion that this is taking too long, what do you think is a reasonable time for a fix, and why? I'm assuming Waymo didn't have a team of flood-detection experts twiddling their thumbs waiting to be prompted into action.

    • autoexec 1 hour ago
      > Presumably they haven't had the chance to do a lot of flood training but now they have that chance.

      They should have done that flood training when they weren't putting people's lives at risk. It's not as if this was a situation that no one could have anticipated would arise. Over half of all drownings in a flood happen because of people driving into them. They're just lucky that they stopped service before they had more blood on their hands, but the fact that they were willing to experiment on the public first is concerning.

      • ashdksnndck 1 hour ago
        “More blood” seems to imply that somebody has already been hurt or died from Waymo driving into floods, but I don’t think that is the case?
        • autoexec 1 hour ago
          As far as I know, nobody has been hurt from floods while in a Waymo. They hide their safety data from the public though (https://www.theverge.com/2022/1/28/22906513/waymo-lawsuit-ca...) so it's hard to say for sure. They've certainly been involved in crashes, killed pets (I actually give them a pass on the bodega cat), run over elementary school children, etc. Waymo has said it's only a matter of time until they kill someone and they've got plans for how to handle deaths caused by their cars, but they expect the public to accept those deaths.
          • RealityVoid 10 minutes ago
            This feels disingenuous to the extreme. Yes, chances are that some people will die run over by a Waymo. Put enough miles in one and someone will die eventually. Compare the numbers to human drivers. Would you, if they had LESS fatality rates than human drivers, say that the difference is "lives saved"? - I don't think you would. In 5 years, after someone is eventually fatally injured you'll just jump up and say "AHA! Told you Waymos are unsafe!"

            Especially your example with "run over elementary school children" is duplicitous. They showed how much less dangerous the impact from the Waymo was.

  • Findecanor 16 minutes ago
    This is a classic case of: if the situation is not in the training data then the model is unequipped to handle it.

    We've seen the phenomenon before. We've been warned against the phenomenon before, and we'll see it again in other contexts in the future for sure.

  • etempleton 3 hours ago
    This is really my bear case against AI. I am not against it. I actually think it is really neat! But we have been working on driverless cars for how long and spent how much? And still things like a flooded roadway completely throw them.

    Tesla failed to deliver driverless cars but now is pivoting to the much more complex fully autonomous robots. And we can’t get AI to stop hallucinating facts, but any day we are going to be at AGI in a few years? I get people want these things to happen, but I just don’t see it happening any time soon. The whole tech industry feels built on what maybe, someday, possibly, could happen but most likely won’t, but we are all going to act like is a sure thing and is just around the corner.

    Are there no responsible adults left at these tech companies?

    • ACCount37 2 hours ago
      The "responsible adults" know that chasing perfection gets you nowhere fast. A part of growing up is learning to put up with "good enough".

      A car that only fails in a road conditions edge case is good enough for the vast majority of cases. You accept that, and issue a manual override for when that edge case pops up. Then you add that edge case to your training sets. Then the issue never comes up again.

      If you think that "flooded roadway" is a case that's handled gracefully by every human driver, and it's the AI that's uniquely prone to failure, I have news for you.

      Multiple cities with uncommonly flooded roadways get surges of "water flood engine damage" cars at the repair shops in the wake of extreme weather events. Human drivers underestimate just how flooded a roadway is, try to push through it, and have their car choke, die, and float there, waiting for some good samarithan with a snorkel and a long rope to pull it out. Then someone gets to play the fun game of "is this ICE toast or will it run once you get the water out".

      • autoexec 1 hour ago
        > The "responsible adults" know that chasing perfection gets you nowhere fast.

        I wouldn't call being prepared for very common life threatening events experienced by drivers "chasing perfection". The people with stalled cars are the lucky ones. Most of the drowning deaths in floods come from people who drove right into them.

        I'll give them credit for over-correcting before deciding to pull out until they figure out how to handle floods even though it left people stranded on the road because of a small harmless puddle. Better to do that than take the risk and drive into a dangerous situation. Even still, this is something they should have fully tested before the cars ever hit a public street.

        • srdjanr 1 hour ago
          I wouldn't call floods "very common"
          • autoexec 1 hour ago
            "Floods are the most common and widespread of all weather-related natural disasters...Flooding occurs in every U.S. state and territory, and is a threat experienced anywhere in the world that receives rain." (https://www.nssl.noaa.gov/education/svrwx101/floods/)

            If they were going to plan for any kind of dangerous weather, flooding should have been very high up on that list.

            People tend to take flash flood warnings way less seriously than tornado or severe thunderstorm warnings. I guess that people think of dangerous floods as being something much more obvious and dramatic than a street puddle just one foot deep, but flooding is no joke.

            "Turn Around Don't Drown" PSA (https://www.youtube.com/watch?v=eI6mIlHKrVY)

            • bluGill 1 minute ago
              They are still not very common. They happen more than other weather, but that still isn't common.
          • kibwen 1 hour ago
            Any given person might only experience a single flooded roadway or two in their lifetime. But that doesn't mean that there aren't tens of thousands of people exposed to flooded roadways every year. Something can be individually uncommon and yet frequent in absolute terms.
      • JamesSwift 25 minutes ago
        Well its not that simple. In the same way that throwing an LLM into a process will always have a risk of blowing up spectacularly.

        In this case it failed open. It didnt recognize that it was in an edge case (which itself is an edge case). So what are you proposing to be the solution to that? If the car itself does not recognize that its in an abnormal situation that needs intervention then how do you intervene?

        • Fernicia 13 minutes ago
          His point is that humans are prone to the same error. The flooded engine damage doesn't come from humans recognising the danger of a flooded road and choosing not to attempt it.
      • 48terry 22 minutes ago
        > A part of growing up is learning to put up with "good enough".

        "I feel content with good enough in this case." - quote from child whose body got folded in half by a Tesla

        Your growing up and adulthood sounds a lot like settling for mediocrity from those who push shit on us without asking if we ever wanted it. Floods aren't a special edge case, they happen all the time. The people making these are so stupid and blind to reality they didn't think about the most basic 101 case of "what if it isn't a perfectly dry and sunny California day" because thinking isn't on the to-do list for these people. This shit is ass. Get it off the streets.

        • cheeze 14 minutes ago
          ... which is different from the child whose body got folded in half by someone looking at their phone?

          I think "good enough" ends up being okay. I _like_ driving. I would do manual mode often still just because I enjoy it. But I'd be completely fine with the option of autopilot in good conditions. Reality is that 99% of the time, my commute is boring and in good conditions. I don't need a self driving mode that can handle a blizzard when I'm in stop and go traffic and it's 20c outside.

          This is much harder for Waymo since there isn't as easy of a manual override mode... But in my car? rip it.

          Luckily I basically already have it. Adaptive cruise covers most of my cases well enough, but I wouldn't mind something with a bit more control (turning, etc.)

    • wtp1saac 28 minutes ago
      I'm not aware of any self-driving widely available ten years ago. I just took my Model Y over Highway 1 in California without requiring human intervention (other than when I chose to pull the car over).

      Obviously when these things can become fully autonomous isn't absolutely clear, and there may always be some discomfort with a probability of failure without a human chain of responsibility.

      But, given ten years ago this didn't exist at all for consumers, and it now more reliably does? It doesn't seem insane to think ten years from now, it might address more edge cases, and be safer and more effective.

      Why would you look at the general trend and assert jettisoning the effort?

      EDIT: It seems some of the tech started rolling out 2016; my mind mentally was thinking 2015. So maybe this started about a decade ago. Though still, the trajectory is a decade of these systems going from limited assists toward greater autonomy with demonstrable progress.

    • tptacek 3 hours ago
      I was (I think the search bar will prove this out) a pretty committed skeptic of driverless cars, but I've come around on them in some use cases. I'm not optimistic about them on highways. But they solve some important problems in regional/local transit.

      We're contemplating standing up an EV shuttle service in Oak Park. It will fail. As I understand it, we've piloted non-EV versions of a shuttle service; they failed. The problem is that in small local areas, the staffing for a useful transit service is too expensive; that's because "useful" imposes constraints about responsiveness, coverage, and most of all hours of service, which mean the service won't pencil out with the ridership it'll get.

      An autonomous vehicle transit service in our muni would probably work fine; it's a strict grid system with very low speed limits (AVs will, in our area, be strictly better drivers than the median human drivers --- this isn't a statement about human fallibility so much as an observation about scofflawry in our area). And if the product existed, we could afford it, because we wouldn't be paying fully loaded headcount costs for 2+ shifts of drivers at epsilon levels of utilization.

      For whatever it's worth, I don't really have "autonomous vehicles" and "LLMs" in the same bucket in my head. I'm bullish on both, but for very different reasons. It usually doesn't occur to me to think of Waymos as "AI", though, obviously, they are.

      • zamadatix 2 hours ago
        I'm bullish on AI as a replacement for Uber from airports well behaved climates I frequent but bearish on how long it'll take to actually make a damn for me needing my car in Ohio until the mid-late 2030s at this rate. It's just so close and so far away at the same time.
    • RationPhantoms 2 hours ago
      I will posit something that guides my own thinking about this; robotaxis will never drink and drive. I'll take whatever flavor of mistake they conjure over that. I can deal with stupidity, I cannot (and don't want to) deal with malice.
      • 3498q2 17 minutes ago
        Many people don't drink and drive either. You can drive defensively, choose your own route.

        Even on two lane roads: if an idiot overtakes into oncoming traffic there is usually just enough space for three vehicles next to each other. Can a Waymo move sharply to the right so there are two cars on each side with the overtaking idiot in the middle and all just fit on the road? I had to do that maneuver at least twice.

        Can a Waymo prevent a carjacking when someone places traffic cones in front of it?

        Can you open the Windows and get out if the thing decides to drive into a lake?

        I don't know, currently defensive driving is the better option.

      • ACCount37 2 hours ago
        "No DUI" is a big part of why even the current, flawed and markedly subhuman, self-driving cars casually beat human drivers on road safety.

        A self-driving car AI pays less attention than a human driver at his best. It isn't as aware as a human driver at his best. It doesn't have the spatial reasoning, the intuitive understanding of physics and road dynamics that matches that of a human driver at his best.

        Human drivers still fall behind statistically, because human drivers are rarely at their best. And the worst of human drivers? It's really, really bad.

        AI is flawed, but a car autopilot doesn't get behind the wheel after 3 beers and a pill of benadryl. It doesn't get tired, doesn't get impaired, doesn't lose sleep or succumb to road rage. It always performs the same.

        Until it gets a software update, that is. The road performance of an average car AI only ever goes up. I don't think that's true for human drivers, frankly.

        • RationPhantoms 13 minutes ago
          Yep, on the money.

          It's not too dissimilar from the Figure demo that was done on X/Twitter recently. Everyone was pointing out what a lackluster demo that was and here I was thinking the total opposite, it worked for 8 hours with no sexual harassment training, KPIs, management oversight, breaks or co-worker chatting. That's the worst job it'll likely ever do. We just witnessed the floor of it's capabilities.

          My hope/vision with robotic cars is we make cities more human-friendly/accessible. I want revitalized/bustling downtowns of bikes/bodies and not, what some cities are, which are glorified parking lots. I want to be less alone as an american. I would a physical sense of community injected back into my veins.

        • svieira 1 hour ago
          > Until it gets a software update, that is. The road performance of an average car AI only ever goes up.

          Aren't there stories about certain car companies where their self-driving-at-some-level cars got worse after an OTA update?

        • fragmede 2 hours ago
          Tesla's self driving will pull over if it detects the human driver has fallen asleep.
      • Theodores 1 hour ago
        The option that doesn't exist in America is to get the bus.

        Before the pandemic I was commuting by bus and this meant an early start to the day, but not as early as what the bus driver had.

        The bus had its own community, so I had my 'bus buddies' and the journey would always be quick because of the social aspect to it. The bus drivers knew the customers and their needs. What the bus drivers had that is absent in robotaxis is working class pride. Working class pride means a job well done, with certainly no drinking, looking at texts or navigating the route.

        We had economy of scale, with dozens on the bus, about 80% occupancy. Getting a robotaxi every day would be too expensive for most of us on the bus, plus the traffic would be hell.

        Getting the bus out the depot on a freezing cold winter morning was a challenge, with much to de-ice. Our bus drivers didn't dissapoint.

        There were a couple of incidents, we had some tree hit the upper deck, taking out the upper 'windscreen'. We also had a car driver pull out on the bus, for his car to be cast aside like a toy. Again, our bus drivers stepped up and made sure everyone was okay.

        Could the AI magic have prevented both incidents?

        Maybe. But maybe not.

        The elderly driver that pulled out on the bus should have been on the bus and not driving. As for the tree that 'pulled out on the bus', that was a highway maintenance issue.

        There were other niceties about the bus, for example, thanking the driver. I am sure I always did that, and it always felt good to do so. If I was late and 'our' bus driver saw me running for the bus, he or she would wait. Another reason to be thankful.

        At the time I thought I was reasonably well paid. However, our bus driver was on the same money as me, if not more. His or her salary stayed in the community, it wasn't as if Silicon Valley venture capital was leeching away what we all spent on bus fares.

        One frustration of a bus is that you are stopping a lot to pick people up. Having wifi (or bus buddies or a good book) made that okay. However, it wasn't the scheduled bus stops that bothered me, it was the stops from 'traffic', as in the hordes of single occupancy cars. Inching forward is no fun at all, whether in a robotaxi or a bus. However, for the final stretch into town, we had a dedicated bus lane.

        I think that a lot of human potential is wasted by people spending half their lives sat in traffic and robotaxis go some way to solve that. However, give me the bus, with a driver that has working class pride, any day.

    • liveoneggs 2 hours ago
      I actually took a waymo down North Ave (where one got stuck) a few weeks ago and it was very pleasant.

      I'm pretty conservative about this stuff but the waymo is genuinely nice to ride in.

    • northerdome 1 hour ago
      This is very much expected while the kinks are worked out. The reason Waymo is rolling out their vehicles in Atlanta in partnership with Uber is precisely for scenarios like this. Standard Uber service provides a backstop for when times when Waymos can't fulfill rides.
    • bsimpson 2 hours ago
      Motorcycling used to be one of my biggest hobbies.

      I live in NYC now. Drivers here are some combination of utterly selfish and mindlessly distracted. You can't even trust them to stop at red lights. It gives me a huge amount of pause riding here.

      "Cars are dangerous, necessary in many places, but often driven by irresponsible people" is a huge problem that needs solving. Waymo seems to have been doing a pretty fantastic job at it.

      And even if they couldn't figure out how to route around floods, floods are rare. They're still a net benefit to society.

      • yurishimo 2 hours ago
        Tbf, I think you’re just experiencing a downside of living in NYC. I’ve only ever been there as a tourist, but I wouldn’t ever dream of renting a motorcycle in the city for the reasons you mention.

        For context, I live in a highly dense European country and I wouldn’t ride my motorcycle in our most densely populated city centers either. For me, a motorcycle is luxury transportation for when the weather is cooperative or I want to enjoy the journey to my destination. If I want an efficient commute, I’m gonna take the train into the city and enjoy the relaxed state of mind knowing I don’t have to navigate.

        Drivers have waaaay too many distractions nowadays and I don’t trust most people to be paying attention as much as I want them to. At least out on the open highway, I stand a chance of getting away from them and putting distance between us. In a city, my options to create space often don’t make much of a difference due to congestion in general.

        I hope you can find the opportunity to ride more in the future. :)

    • keybored 1 hour ago
      AI as commonly discussed is just pretty-general intelligence that is very economically valuable. Not AGI outside of the true believers.

      And can we discuss AI drivers and AI LLMs in the same paragraph? One is a special application of trying to emulate a very particular human embodiment, with all the sensory challenges. The other is a brain in a vat. Both can fail and flourish independent of each other, or at least I see little overlap.

      • red75prime 25 minutes ago
        VLAs (vision-language-action models), which are offspring of LLMs, and their versions that are more suitable to edge devices are being used in self-driving to add common sense to path planners ("don't drive through a police standoff", things like that).
    • aerhardt 2 hours ago
      I’ve just been to Austin where self-driving cars are everywhere but found to my disappointment that they can’t do trips to the airport.

      To your point, knowledge work, as a whole is a much larger and complex domain than self-driving.

      • fragmede 2 hours ago
        The reason they can't do trips to the airport is regulatory and not technical.
        • aerhardt 1 hour ago
          What they told me and I can read online is that they don’t because they can’t operate on the Austin highways. Have you read anything that’s more detailed?
  • paxys 3 hours ago
    Driving through an obviously flooded street thinking "I'll easily make it" and getting stuck in the middle? Yeah, these cars have achieved human level intelligence.
    • ge96 3 hours ago
      Just get a jeep snorkle
      • abfan1127 2 hours ago
        jeep snorkels are for air intakes for engines. electric cars don't have air intakes. they have air cooling for batteries... I suppose you could snorkel those.
        • fragmede 2 hours ago
          Depends on the EV. Some of them have liquid cooling for their battery pack.
      • nutjob2 3 hours ago
        What happens when you you start floating?

        I guess water propulsion... and a rudder?

        • nielsole 2 hours ago
          You need to get an armored jeep then
        • bell-cot 2 hours ago
          A decent welder should be able to turn out a trailer hitch <=> outboard motor bracket in under 15 minutes. It's not like you'll need much more than a modest fishing outboard to get through flooded spots.
      • radiorental 3 hours ago
        [flagged]
        • jader201 3 hours ago
          > Please don't post comments saying that HN is turning into Reddit. It's a semi-noob illusion, as old as the hills.

          https://news.ycombinator.com/newsguidelines.html

        • ge96 3 hours ago
          Yeah was a joke as I think most cars if you drive through that your car is f'd
        • _heimdall 3 hours ago
          Ironically, a properly sealed EV system would better deal with a flood. Combustion engines have issues due mostly to the air intake and exhaust.
          • masklinn 3 hours ago
            You'd need to ensure every electrical connection is in a waterproof location which I'm pretty sure is not a thing for any standard car manufacturing. Cabins are also rarely watertight.

            AFAIK your best bet is a diesel with a snorkel, and hope things have dried off before you need to restart the engine.

          • gruez 3 hours ago
            Are EVs typically "sealed" by default? If not, how is going through the effort to "seal" an EV different than installing snorkels for ICE cars?
        • b40d-48b2-979e 3 hours ago
          Their account is about as old as yours.
          • radiorental 3 hours ago
            More a comment on how HN has devolved in the past 2 years, if I want snark, this isn't the place I go to find it.
            • b40d-48b2-979e 2 hours ago
              Really? I find more bad faith and snark on HN than anywhere else and always have.
        • alex1138 3 hours ago
          People are allowed to joke. We don't always need 'substantive comments'
          • radiorental 3 hours ago
            It's not a joke if it doesn't make any sense, what good is a snorkle on an electric car?
            • Rooster61 3 hours ago
              That's...the joke. The humor is in the absurdity of recommending an addon to the car that utterly would not work and would look ridiculous. It's layered on the fact that Jeep snorkels look sort of ridiculous even on the vehicles they were designed for.
    • retrocryptid 3 hours ago
      That being said... it's actually somewhat uncommon for humans to drive into flooded streets. To the degree that people think it's notable enough to take videos and post them to social media. I don't have the data, but would be interested to see how many times per passenger mile travelled human-directed and remotely-operated vehicles like Weymos drove into flooded streets.

      I can appreciate the cameras and lidar on the Weymos don't give their remote operators a lot of good data about the depth of water on the road-way. As you point out, humans in cars often don't get this right. I think the humans that don't drive into deep water are the ones who a) give any amount of water on the roadway a big NOPE and b) people familiar with the local environment and use multiple visual clues to judge the true depth of the flooding.

      • throwup238 1 hour ago
        It shows up on social media when it’s a rare event for that area. It’s uncommon but “happens all the time” here in California in the deserts every heavy rain either because locals forget how deep the flood control washes are, or because tourists just drive into them thinking its a straight road, despite all the signs and warnings posted around them.
      • slongfield 2 hours ago
        As far as I can tell from these articles, driving into a flood has happened twice to Waymos, once in Texas and once in Atlanta? It does seem like it's pretty uncommon.
    • thegreatpeter 3 hours ago
      Let’s redirect the problem: it’s not the car, it’s the flooding! We should address that first
    • themafia 2 hours ago
      Ask the car, in the sense you can, why it drove into the water.

      Then ask the human.

      I'm not sure you'd walk away the idea that they have equivalent intelligence. The human at least knew the water was there and took a risk, the car, presumably, had no idea what was in front of it and drove into it anyways.

    • fastball 3 hours ago
      This is why I personally feel like Tesla's approach is more likely to "win". The fundamental blocker to self-driving cars is not sensing / sensor fusion, it is intelligence. And the Tesla approach seems much more likely to achieve functional intelligence than Waymo's.
      • RealityVoid 8 minutes ago
        Naaah, Tesla has no edge in intelligence either. It's just a PR piece to sell to investors.
      • mschulkind 3 hours ago
        While I agree with basically all of this, and find the FSD on my Tesla to be quite useful, a question pops into my mind.

        Why can't Waymo ALSO develop the same smarts and just also solve the sensor fusion issue such that they can use the right set of sensors in the right environmental conditions, and then leapfrog Tesla's capabilities?

        • ai-x 3 hours ago
          I thought about this and I think it boils to how the model is trained.

          Tesla trains it models from actual drivers purely based on (input) Vision and (output) actuators - Brake, Steering, Accelerators.

          Human output is based on what they and the camera sees. So, it's a 1:1 match.

          If Waymo were to do that, it'll muddle the training set. The Lidar input may override camera input.

          I always struggled when Musk mentioned Lidar will make it ambiguous. It didn't make any sense to me why having a secondary failback sensor messes things. But, if you put it in the training data context, it absolutely makes sense.

          • mschulkind 2 hours ago
            This is an interesting viewpoint, but isn't it also solveable?

            Just because the human in the scenario only took vision as input, why does that matter to the training data and the model? The actions are the same.

            To put it another way, what about all the cultural context the human had, or the sounds, smells, past experiences at the same intersection, etc? Even Tesla can't record this, but I'm not sure that matters.

          • tintor 2 hours ago
            The biggest issue with using both camera and lidar is how to properly resolve conflicting returns from different sensor types.
        • plqbfbv 3 hours ago
          > such that they can use the right set of sensors in the right environmental conditions

          Because this part is really hard, and that's why Tesla abandoned the fusion approach. You cannot possibly foresee all the conditions in which LIDAR or any active sensor will malfunction/return wrong data/return data that's only slightly off for that ONE specific time. And even if it doesn't, you need to trust it to not return noise. And when it does return noise, how do you classify it as noise?

          Cameras are passive sensors - they get whatever light comes in and turn it into an image. Camera is capturing shapes that make sense to the neural nets: it's working. See all black/white/red/cannot see any shapes? Camera is not working, exclude it from the currently used set of sensors or weigh it less when applying decisions, because it's returning no signal (and yes, neural nets have their own set of problems).

          EDIT: cameras also provide more continuous context: if 1 pixel is off, is clearly bright red in a mostly-green scene where no poles can be identified, the neural net will average it out and discard it as noise. If 1 pixel says "object" in LIDAR, do you trust it to be correct? Perhaps the ray just hit a bird or a fly, but you only see a point, it's a lossy summary of the information you need.

          • mschulkind 2 hours ago
            But why can't you apply all that same logic and processing to LIDAR as well. Maybe we're not there yet, but about about in 5-10 years when we are?
          • tintor 2 hours ago
            There is noise on LIDAR returns too. No one considers a single LIDAR point to be a collision hazard.
        • briandw 3 hours ago
          Because they don't have a fleet of millions of people labeling the data for them and paying for the privilege of doing so. Waymo has about 3700 vehicles. Tesla has millions. Waymo only operates in known environments and collects a very limited range of data. Tesla collects data everywhere that people drive their cars.
        • ACCount37 2 hours ago
          They could in theory. If they put at least as much emphasis on the AI side as Tesla does. Or if someone else cracked vehicle AI wide open and left it open for them to copy, and then they did exactly that, and found a way to bolt on their extra sensors in a useful fashion while at it.

          As is, Waymo's playing it smarter than Cruise did, but they're not all in on AI yet. So I don't expect them to "leapfrog Tesla" in that dimension - and it's the key dimension to self-driving.

        • CSMastermind 3 hours ago
          I got downvoted for saying this last time the topic came up but constraints focus a project. It’s best to start work with as few variables as possible, and only add new ones when absolutely necessary.

          I'm working on a similar problem in computer vision and we're quickly approaching the point where our pure vision work is better than our Lidar supported track because we've had to deal with the constraints instead of having a crutch to lean on.

          • mschulkind 2 hours ago
            I agree, but these are also the exact constraints that lead to an early leader getting overtaken by a longer term, yet better set of plans. Not saying that's the case here, but given how much success Waymo has had so far, over really everything Tesla has produced, says quite a bit about the likelihood of the approach, even if it's not yet there.
        • tintor 2 hours ago
          The main reason Tesla's don't have LIDAR is hardware cost and maintenance cost, not improved safety.
          • SoftTalker 2 hours ago
            Maybe also that cars with a LIDAR rig on the roof are appallingly ugly.

            Tesla wants to make EVs that look like normal cars (Cybertruck being the oddball here, admittedly).

      • venussnatch 3 hours ago
        You can have intelligence with lidar.

        You can have even more intelligence with both.

    • ramraj07 3 hours ago
      They never advertised that they did. Its not even real true AI. They just struggle with new scenarios.

      People drive into floods too. They just don't get sensational articles written about it, just posted on reddit.

      • sarchertech 3 hours ago
        Taxi drivers with passengers don’t tend to though. At least not at the same rate.
      • mschulkind 3 hours ago
        Whoosh...
  • jvanderbot 4 hours ago
    Snark aside, there will probably always be conditions in which waymo is not the right answer. Are they going to do hurricane evacuation? I think removing the driver just necessitates this.
    • VoidWhisperer 4 hours ago
      While this is going to be an overly optimistic scenario: Imagine how smooth a hurricane evacuation would go if _everyone_ used a self-driving car to do the evacuation - atleast there might be less gridlock than there is during any usual hurricane evacuations. And assuming the self driving cars don't do something stupid that causes every car behind it to essentially lock up and stop moving

      That said, I know a scenario like that would never happen, probably for the best.

      • Eji1700 3 hours ago
        The problem is they're not designed for that. They aren't spending resources on some master control networking system because in 99% of use cases that won't be useful anyways as most of the traffic being dealt with isn't other waymo's willing to communicate.

        There might be some level of adoption where they would, but honestly we're back to "but what about trains/trucks?".

        Half the problem with evacuations is people don't want to leave behind their stuff to get destroyed. You'd basically be better off getting a fleet of semi's with some quick and dirty cube system thrown up than a bunch of automated sedans.

        • m0llusk 3 hours ago
          Sort of. There is no built in support for evacuation methods, but the WayMo absolutely does use a master control system for network the cars. This is how the database of streets is kept and is why WayMo vehicles occasionally swarm private non through way ally streets when there is some glitch in the database that indicates private ways are available roads or an ally that looks like a through way turns out to have a fence between properties.
      • toast0 2 hours ago
        > atleast there might be less gridlock

        I've never lived in a hurricane area, but when I think of news coverage of problematic evacuations, they're showing people stuck on highways, not people stuck in urban traffic grids.

        It's a throughput problem. Computer controlled "car trains" with shorter following distances can boost traffic throughput, but I don't think that would be enough to make evacuation of large cities actually feasible. The highway system is simply not built for that use case. Especially since evacuation often occurs during inclement weather that reduces capacity.

        AFAIK, most places try to figure out how to make shelter in place work, because mass evacuation is likely to end up with many people facing the weather event while on the highway.

        You could theoretically do better with busses and trains, things, but there's likely not enough busses that are setup for long distance travel available: lots of municipal bus fleets are setup for alternate fuels which is great for emissions but makes it hard to travel to a neighboring state, because there may not be appropriate fueling opportunities on the way. Etc, etc.

        • antonymoose 1 hour ago
          I’m from a flood prone, hurricane prone area - there were some painful lessons from Hurricane Andrew, famously the hurricane tie system for buildings in Florida which quickly spread, but in South Carolina they also learned a very important lesson - reverse all lanes on the interstate so everyone can flee as quickly as possible. The “stuck on I-26” problem no longer exists. I’ve personally driven 100+ miles in “the wrong way” to evacuate. It’s quite fun. They also perform statewide annual drills to make sure all emergency staff can faithfully execute this reversal pattern.

          Do other states not do this?

      • Jabrov 3 hours ago
        Why would there be less gridlock if people were in a driverless car instead of a regular car?
        • craftkiller 3 hours ago
          With human drivers: traffic light turns green. The first car starts driving. The 2nd car waits 2 seconds and then starts driving. The third car waits another 2 seconds (4 seconds total) and then starts driving. The fourth car waits another 2 seconds (6 seconds total) and then starts driving. etc.

          With computers driving: traffic light turns green. All cars simultaneously start driving. It'd be like a train but without the efficiency.

          Similarly, with human drivers: some jackasses drive into the box and the light turns red. Now perpendicular traffic is either fully blocked or must proceeed slower to maneuver around the jackasses. With computer drivers, they shouldn't intentionally break the law and they should have plenty of sensors to figure out that they cannot make it through the box.

          • xvedejas 3 hours ago
            Safety margins still will require some level of delay between cars that aren't mechanically linked. Even with perfect reaction times, the physics of driving (maximum acceleration rates, possible loss of traction) dictate this, it's a non-trivial control theory problem. Besides, it doesn't seem to be a goal of Waymo; I've seen lines of their vehicles before and they all behave the same way as in mixed traffic.
          • levi-turner 2 hours ago
            As a sorta informed outsider, conceptually this makes intuitive sense. But in practice, how does this work? It seems a lot of the intuition breaks down if we don't assume it's network (aka 1 vendor). Fundamentally it's a bunch of external actors where we cannot verify trust and in order to solve for the needs of the individual, suboptimal choices must be made. To put it another way, even if computers can drive cars, what _else_ needs to be in place for this vision?
        • loudmax 3 hours ago
          Ideally, robot drivers will some day be better drivers than humans in all road conditions. They'll be able to coordinate fast lane merges and busy intersections by subtly adjusting speed without vehicles having to stop.

          Imagine a busy intersection where all the cars fly past one another at 40 miles an hour without stopping but none of them crash. Humans can't do this, but machines could, if, and when the technology gets there. To be clear, there's still a way to go.

          • b40d-48b2-979e 3 hours ago
            Evidence suggests... no, that day is never coming.
            • etskinner 3 hours ago
              Once all cars are autonomous, that day is certainly coming. Even before then, it's very likely we'll see platooning in the future, even if there are still some human drivers.

              Also, this already exists in some places. Look at a video of how to cross the street as a pedestrian in Vietnam: You literally just start walking across and people weave around you. Or look at driving in India and similar places.

              All I'm saying is never say never

              • ydse 2 hours ago
                Right… any time now.

                If you want to write with such confidence perhaps you should share what the lottery numbers are?

                • fragmede 1 hour ago
                  Never is a long time though. Even if it takes 500 years for that to happen, it will still have happened.
          • bakies 3 hours ago
            busy intersections have more than just cars, my jay walking is going to cause a massive pile up
        • lukevp 3 hours ago
          Traffic is usually caused by adding inefficiencies across a system with little slack - someone brakes too hard or too early, and if all the cars are stacked up, that one brake event can ripple through hundreds of following cars, getting worse and worse because each person brakes more. Self driving cars can perfectly sync up and move like a train. Theoretically there could be no traffic on highways if all cars are self-driving. Rarely is a highway so full that there couldn’t be more cars (eg. The entrance ramps are backed up) which implies the issues are related to the driving flow and not the capacity of the street itself.
          • queenkjuul 3 hours ago
            > Rarely is a highway so full that there couldn’t be more cars

            Yep, here in Chicago you might even go as many as 12 hours between such events

        • Rebelgecko 2 hours ago
          Self driving cars don't panic and drive recklessly. I don't live in hurricane country, but most accidents around here are caused by drivers who are on their phones/spacing out or driving super aggressively.

          Most traffic jams are caused by accidents or people slamming the brakes

        • tialaramex 3 hours ago
          In principle the driverless cars are more able to organize fleeting, operating in a way that's not actually practical if you don't share a single guiding directive.

          I don't know that you'd ever see this in practice, but it's much more practical in theory for almost identical machines running the same software than for a bunch of humans in a variety of vehicles who've maybe only half understood how to do this.

          Also, for this specific problem we know humans are idiots. They should all be driving an agreed route to the agreed evacuation point, but some real humans will decide they know a shortcut, they want to drop past Jim's place, or whatever. Just as there's a difference between what the protocol says happens when you have to abandon an aircraft on the tarmac versus the reality that people will decide they want to self-evacuate and they need their carry on bags and chaos ensues and maybe people die.

        • paxys 3 hours ago
          Same reason there's less gridlock when people obey traffic lights and other rules of the road and don't brake randomly. If every car on the road drove itself then there would never be traffic.
          • queenkjuul 3 hours ago
            This is literally not true, roads still have finite capacity, and sometimes demand exceeds capacity.
        • daveguy 3 hours ago
          Well, probably not the current generation of driverless cars. Those would be a nightmare. Contrary to what some want to believe self driving cars do random shit all the time.

          But in the future, if there is a coordination standard among driverless cars, that could allow much higher density at higher speed. Coordination standards + higher density of self driving should reduce the self driving cars doing random shit too.

      • tintor 2 hours ago
        "assuming the self driving cars don't do something stupid"

        This is a big assumption.

        This requires that all cars are self-driving cars capable of complex reasoning on in-car compute without relying on network connection, as network connections can't be assumed reliable in hurricane conditions.

      • bink 2 hours ago
        Now imagine if the power is out and cell service is down. We saw that happen in San Francisco and it was chaos.
        • MarkusQ 22 minutes ago
          That's why on-board sensor only systems are the way to go.
      • kjkjadksj 3 hours ago
        It would be a failure. Turns out they do something stupid. People tested this in sf by calling a bunch of waymos at once for a prank, but I guess that is the best case example of what a panicked evacuation on the service might be like. It was like a ddos attack. They ended up gridlocking themselves and turned it into a real life version of one of those rush hour board games. No one got out of the little area they called the waymos in.
      • steveBK123 3 hours ago
        I mean the logical conclusion is a dedicated lane for automated cars..

        At which point we've reinvented privatized buses with a last mile convenience vs greatly reduced throughput trade-off.

        • treis 3 hours ago
          I doubt it's less actual throughput in most cases. In a place like Atlanta there's no place where it's bus after bus. The BRT line they built nearby is a bus every 10 minutes. Which being very generous to the bus usage is equivalent to like 5 cars a minute.
        • ghaff 3 hours ago
          Just take away the sidewalk and bike lane :-/
    • Aboutplants 4 hours ago
      Evacuation is a use case in my mind. Having a fleet of shuttles on command to move people in preparation of a hurricane would be a benefit. They would obviously need to put weather limitations during actual storms because no one should be driving in a hurricane.
      • steveBK123 3 hours ago
        Evacuation you want to prioritized throughput - think of how little road space 100 people in a bus take up vs say 50 cars with 2 people each. Or even 25 cars with 4 people each.
        • ua709 3 hours ago
          If you have central control you might even be able to get away with changing the rules. i.e. most roads are now one-way leading out of the city. voilà we nearly doubled outbound throughput. Even just for commuting that would be awesome, not that it is happening anytime soon, but one can dream, especially while sitting in gridlock traffic.
      • VoidWhisperer 3 hours ago
        > No one should be driving in a hurricane.

        I agree, but there are a number of people here in Florida who will do it or die trying (emphasis on the die trying)

    • hooloovoo_zoo 3 hours ago
      Except the Waymo can do 150 mph bumper to bumper with other Waymos if you let them.
      • AngryData 1 hour ago
        Under an idealized situation sure, but I could get a 150 mph train of cars following me 60 years ago too if anybody had a use for that.
      • bakies 3 hours ago
        .. well until it hits the flood
  • reed1234 28 minutes ago
    I imagine it is hard to determine how deep the water is. There is a lot of training with small puddles (ignore) and not much with deep water.

    Still, it should be cautious as any human driver would be.

  • httpz 3 hours ago
    Guessing the depth of a puddle is not an easy task. Many untrained horses will refuse to step into shallow puddles. Then we also have human drivers driving into flooded road.
  • xnx 4 hours ago
    I wonder how much of this is trouble perceiving water depth vs integrating that understanding into the larger driver model without creating regressions elsewhere.
    • thewebguyd 3 hours ago
      I don't think there's a good solution right now. You can't just go based on surrounding traffic because humans are also stupid and flood their cars all the time.

      You could maybe use short-wave infrared cameras combined with ground penetrating radar, but it'll get real expensive so probably not commercially viable.

      I think the only "good" solution is to have the car be overly paranoid, and if it detects water on the roadway that's bigger than some arbitrary diameter (to rule out mud puddles), then the car has to assume its a flood, stop, and escalate to a human or change the route.

      Alternatively, just don't run Waymo operations during flood/flash flood warnings. Maybe we as a society need to top forcing everything to still operate normally during natural disasters. It's OK to shut things down when safety calls for it, and that applies to human drivers too. If areas are flooding, stay home.

      • kieranmaine 3 hours ago
        > Alternatively, just don't run Waymo operations during flood/flash flood warnings.

        FTA

        > the company said that it shipped an update to its fleet that placed “restrictions at times and in locations where there is an elevated risk of encountering a flooded, higher-speed roadway,”

        > But even those precautions apparently were not enough to stop the Waymo robotaxi from entering the flooded intersection in Atlanta. Waymo told TechCrunch on Thursday that the storm in Atlanta produced so much rainfall that flooding was happening before the National Weather Service had issued a flash flood warning, watch, or advisory.

      • wongarsu 3 hours ago
        Their fleet is constantly scanning the area with lidar, which is assembled into maps. If those maps are in 3d rather than a 2d road grid you can calculate puddles very accurately with no extra sensors:

        - Find the edge of the water using vision or lidar

        - look up the ground height at that position in your map data. That is the water level

        - run a flood fill of the local 3d map starting from that point, with that water level. That gives you an exact shape of the puddle

        - for any point on your planned path, you can now check if the point is in the puddle (per the flood fill above) and how deep the water is (difference between puddle's water level and ground height)

        - use that either as a go/no-go for a planned path, or even feed this into your pathfinding to find a path with acceptable water level

        The main limitation is that it assumes that the ground hasn't changed. It won't help in a landslide, or on muddy ground where other cars have disturbed the ground. But for the classic case of the flooded underpass or flooded dip in the road it should be very accurate

      • AlotOfReading 3 hours ago
        The vehicles have enough information to make the determination. Ground data is available in the point cloud and usually labeled as such. Water sometimes shows up in point clouds, sometimes it doesn't depending on conditions and wavelength.

        If the apparent road surface is higher than the mapped ground surface, probably a puddle. If your point cloud has a big hole, also probably a puddle.

        This assumes you aren't doing ground plane removal, of course. But it's quite likely that Waymo is using a heavily ML approach these days, and I can imagine the poor thing getting very confused if it's not an explicit training goal.

      • sarchertech 3 hours ago
        Do you how often you get flash warnings in Atlanta? And local roads flood far more often than flash food warnings are issued.

        If you can’t handle this issue, you really can’t operate in Atlanta.

      • ge96 3 hours ago
        Would be interesting if you can compare the surface roughness of pavement vs. the surface of water, wind would disturb it too
    • ludicrousdispla 3 hours ago
      In many situations, the depth of the water doesn't matter as driving into it will likely result in death.
    • dangus 3 hours ago
      I feel like re-reading this sentence a few times sends me right to the twilight zone of AI psychosis.

      It’s 2026 and self-driving cars can’t tell the difference between a puddle and a flooded street, something a 3 year old can do.

      Google literally just got off stage telling us that AGI is almost here. Wake me up when this doesn’t feel like an NFT ape fever dream.

      And here we are talking about this like “oh gosh golly I wonder if this is some simple thing that could have been easily solved but they were trying to avoid regressions”

      Get out of town, man.

      I wish every dollar spent by investors on Waymo went into more frequent public bus service instead. A regular-ass bus with a human driver.

      • thereisnospork 1 hour ago
        What 3 year old is judging the depth of a puddle before jumping in?

        Regardless, consider what you are saying: how can you seriously compare a computer to a (young) human and your response is disappointment that the AI doesn't quite measure up? If it's comparable to a child today it will be comparable to a teen in a decade!

  • jeffwask 31 minutes ago
    We had one do this in San Antonio too. Right across the well labeled low water crossing and whoosh.
  • bhelkey 3 hours ago
    Maybe a dumb question, why do electric cars have issues with water?

    My understanding was that ICE cars have trouble because water get's drawn into the engine. Water in the engine causes it to stall. And the engine must have air in flow and out flow.

    An electric car doesn't need air in the same way (no oxygen to ignite with gasoline, no air to compress and expand).

    Shouldn't electric cars to much better at driving through water?

    • hamdingers 2 hours ago
      They can drive through surprisingly deep water, but you'd still rather avoid it for a lot of reasons. Dangerous loss of traction and risk of getting swept away, soaked passengers will want a refund, and a sopping wet interior will take the vehicle out of service for a while.
      • callbacked 2 hours ago
        that and the seal for the battery enclosure can seize up after continuous drives through dirty water, the next passenger may not be so lucky and end up stranded once water breaches the battery pack
    • AngryData 1 hour ago
      You also have to consider the bouyancy of wheels and body panels not yet filled with water which will kill traction, or if the water is moving it doesn't take a lot to push vehicles around.

      Most cars crossing water don't get stuck because the intake is blocked by water but because they either floated or get pushed away by the flow (or slammed into the water hard enough to break stuff). If you maintain forward movement and dont float most cars will keep going in water 4-6 inches above the intake height because of the wake and bubble of the engine compartment. You only really benefit from a snorkel if you are offroading through water where there may be unseen holes because submerging your entire engine and drivetrain that deep is still a horrible idea even with a snorkel.

      Also if you don't have a direct motor on each drive wheel you still have to worry about water entering differentials and transfer cases even if the electronics are perfectly sealed.

    • LatencyKills 2 hours ago
      Deep water can still damage an EV by getting into connectors, sensors, wheel bearings, brakes, and cabin electronics.

      They can also float just like a regular car.

      • SoftTalker 2 hours ago
        Yep if they are watertight they will float, if they aren't, they'll fill up with water.
    • thunderfork 2 hours ago
      Another reason water and ICE cars don't mix is the wiring harness. Even if you don't flood the engine, you'll be having trouble with the electrical for the rest of the car's life. (Or, at least, that's the conventional wisdom)
  • ibejoeb 4 hours ago
    I assumed they went to Miami to develop their foul weather capabilities. It's still pretty early.
    • dangus 3 hours ago
      Doubtful. They probably just pause service when it rains. Miami weather is ideal most of the time.

      These self-driving companies have made very little progress on dealing with weather for how long they’ve spent on the problem.

      • janderson215 3 hours ago
        During the “winter”, sure, but it dumps rain during the same and there are flash floods occasionally. I agree with the parent comment that Miami is a great area to test - especially given that the bad weather is seasonal. They can run 24/7 during the good weather seasons.

        Also, the drivers in Miami are a bit more unpredictable than the average driver around the country in my experience, so good challenge cases for self-driving development.

        • dangus 3 hours ago
          Unpredictable drivers aren’t a challenge compared to weather. They’re just 3D objects to avoid. That’s a solved problem.

          The thing about weather is that with a fully automated fleet they can just stop and give up on driving instantly. Rain in Miami doesn’t tend to last very long except in specific storms like hurricanes. Waymo can just not operate during those times.

          I’m very doubtful that a lot of these inherent problems with the technology are being rapidly solved. See: the article.

  • BobBagwill 30 minutes ago
    You're missing the obvious. Waymo trains with human driver data, and idiotic humans drive into deep water constantly. Oh, you want Waymo's to drive better than humans?

    Deep Thought paused for a moment's reflection. "Tricky," he said finally.

  • dyauspitr 29 minutes ago
    Working out kinks. There are going to be a bunch of AI bad people trying their best to pounce on this.
  • asah 3 hours ago
    hard part is that cars should drive through shallow water... but how to know the depth?

    given accurate mapping + realtime imaging, this should be possible albeit a Big Project(tm).

    • antonymoose 1 hour ago
      Assuming they can say the water ends at X and the water ends at Y could they not estimate the depth to a good degree of confidence? Roads have a degree of uniformity I would imagine makes this a solvable problem?
  • bps1418 3 hours ago
    Is it so hard for LiDAR/Camera to detect flood water on road. Water on a road looks like a flat surface to sensors.
  • tintor 1 hour ago
    ... but their World Model said it was ok to drive through the flood.

    Slide 3 in "Extreme weather conditions and natural disasters" section: https://waymo.com/blog/2026/02/the-waymo-world-model-a-new-f...

  • jp0001 1 hour ago
    My guess in the North East in the winter there will be similar stories.
  • losvedir 3 hours ago
    I think another way of framing it is "Waymo pauses Atlanta service due to weather conditions", which doesn't sound at all unreasonable to me. It's no different from "Chicago O'Hare pauses flight departures due to a winter storm" or whatever.

    I think that self driving cars won't ever be able to handle every condition out there, and so there's probably a time when the system will be paused / shutdown when conditions aren't safe to drive in. Honestly, I wish we could do this with human drivers for that matter, too, but some will press on even when they shouldn't...

    • stetrain 3 hours ago
      Well except that there were incidents of cars getting stuck in floods with passengers before they paused the service.

      A closer analogy would be ""Chicago O'Hare pauses flight departures due to a winter storm after 3 planes slide off the runway due to ice"

      Absolutely I think there will be a disconnect between when people think they should be able to drive somewhere (ie to work in a no-visibility blizzard) and when ideal self-driving cars would allow themselves to operate. Maybe society will adjust to be more flexible to natural conditions, or maybe people will get frustrated and drive themselves into the poor conditions as always.

  • Kye 1 hour ago
    We get popup thunderstorms here and those often mean zero visibility conditions even without a flood. It's just part of life in the spring and summer with all that chaotic moisture coming off the Gulf. We might get a few minutes warning. If your robot can't handle that then you're going to have a bad time.
  • ls612 1 hour ago
    Humans have a hard time judging how deep water is too! Turns out neither Lidar nor vision/cameras have the right ability to sense water depth.
  • dev_l1x_be 3 hours ago
    Biblical.
  • wutwutwat 2 hours ago
    It can't mean that, there's a lake there!
  • keeda 2 hours ago
    This is just part of the slog that autonomous driving was always going to be.

    Many many years ago I happened to be in a conversation with one of the guys on a team that participated in the 2005 DARPA Grand Challenge. It was only the second such race after the 2004 one, but arguably the one which set off the autonomous driving race we see today. (Sebastian Thrun's team came in 2nd.)

    I went into the conversation thinking it was going to be an extremely challenging but tractable sensors + control-systems problem. But by the end of the conversation I was like, OMG this is going to be a long-haul slog of solving an unending stream of problems, some potentially even AI-complete (i.e. requiring human-level judgment.)

    We mostly discussed why his and most other teams failed and the failures were so myriad and so technically intractable that I could not see a path to full self-driving for at least two decades. And all of this was offroad, so it didn't even approach the challenges of sharing human-occupied streets. I cannot remember any details unfortunately, but I remember that one car got stuck in a loop due to a problem that would have been trivial for a human to bypass... but that required human-level judgment. As an analogy it was something like a soft obstacle that could safely be driven over. But for the car to know that it would require a database and an "understanding" of all possible obstacles. An LLM could have helped, but back then they were still firmly in the realm of SciFi.

    So the only feasible solution was to painstakingly identify all the edge-cases and work through them slowly, carefully, one-by-one. Which is what Waymo has been doing. This is also why when Elon made his "full self-"driving announcements I knew he had absolutely NO idea what he was talking about, and he was likely going to move fast and break people.

    Flooded streets is just another "bump on the road" to full self-driving, but it seems we're actually getting there now. In retrospect, my 2-decade estimate was surprisingly accurate, I have no idea how I landed on that particular number!

  • selimthegrim 3 hours ago
    Coming to New Orleans soon...
  • colordrops 4 hours ago
    Self driving will never handle all corner cases until they essentially have a frontal cortex. They probably need something like an LLM to help with very high level abstract situations, e.g. avoiding a hurricane like someone else mentioned in this thread.
    • quantummagic 3 hours ago
      A frontal cortex isn't enough; there are plenty of corner cases that humans fail at too. The real test is if self-driving performs on par, or better than, humans in the vast majority of cases. If it saves 50,000 lives a year to go with self-driving, it's a net-win even if there are a few people who die in situations where they would have survived with a human driver behind the wheel.
      • paxys 3 hours ago
        Self driving cars are not going to be accepted if they have only marginally better success rates than humans. Just look at the news. Every minor self driving incident is endlessly magnified by the media while millions of human-caused accidents are just a part of life. That's just how our brains work. All major decisions are made primarily based on emotion, not analytics.
        • notahacker 3 hours ago
          Human accidents don't get treated as "just a part of life", serious human driving errors are often considered so egregious that the person making the error picks up a driving ban or even a custodial sentence.

          So it's actually entirely rational that the bar for companies to be able to ship software that makes those fatal errors without consequence other than an insurance payout should be higher (especially since when fatal error rates can only be estimated accurately over the order of millions of miles, driverless systems are more prone to systematic error or regression bugs than the equivalent sized set of human drivers, and the cost and appeal of autonomy probably means more experienced drivers get replaced first and more journeys get taken)

          • paxys 2 hours ago
            There are over 6 million auto accidents in the US per year. How many of them make the news? I'm willing to bet that most people don't even know about pedestrian deaths that occur a few blocks away from where they live, at intersections they walk through every day. Meanwhile the same people will read about how a self driving car got into a fender bender on the other side of the country and confidently proclaim "this technology isn't safe, I'm never going to use it".
            • notahacker 1 hour ago
              Sure, autonomous vehicles are new, experimental technology so they're inherently more newsworthy, and news reports aren't a substitute for data - though in this case it's a good illustration that AI can make errors humans would be less likely to even if it is objectively better than the average driver at parking and not speeding.

              This not in any way refute my argument that would also be irrational to set the safety bar for autonomous vehicles as "marginally better than humans" , given that AI failure modes are distributed completely differently from human ones, a sufficiently serious edge case bug triggered only once every hundred million miles might make the autonomous system more likely to kill you than humans[1], and for that and other reasons its almost impossible to quantify whether a particular firmware update actually is safer than the average driver (takes around >10 billion miles to approach statistical significance if you're worried about fatalities rather than only weakly-correlated scrape rates, and then you've got to wonder whether the driving conditions are well matched). Especially if we're using that statistical argument not just to license the vehicles for road use but to absolve autonomous system developers of potential criminal liability for actions taken by their software, a luxury humans that wipe out pedestrians with similar driving aberrations wouldn't get.

              [1]the US had 1.38 fatalities per 100 million vehicle miles in 2023, skewed significantly upwards by DUI and other egregious driving behaviour. Less than half that in other countries with different road conditions and also more in-depth driver education. Humans have a lot of car accidents, but they also drive a lot of miles.

          • HDThoreaun 2 hours ago
            Getting banned from driving is extremely rare. Most people convicted of DUI are still allowed to drive.
        • quantummagic 3 hours ago
          Maybe. But insurance rates, and the government's enforcement of laws, are based on analytics, and overcome a lot of human emotional bias.
    • loudmax 3 hours ago
      Humans don't handle all corner cases. People can be slow to react to completely novel or surprising situations. There will be corner cases where humans generally do better than a machine, but the simple rule to slow down and come to a halt if things look too weird or confusing will almost always be the right answer.

      Ideally, driverless cars will one day be better drivers than humans and this will save tens of thousands of traffic deaths per year. Holding up progress because cars will be confused in extremely rare or improbable situations will cost more lives than it saves.

      • com2kid 3 hours ago
        Not only are people slow to react to unusual situations, but this is taken advantage of by city designers to force people to slow down.

        Random planters in the middle of the road? Streets that narrow and then widen? Drivers start slowly creeping along, which means they are less likely to injury pedestrians.

      • eptcyka 3 hours ago
        I think self-driving cars will only become better once they can do all the learning in real time and on-board. Otherwise, they will only be as good as the data they trained on - which is ultimately real meat driver data and a derivations of said data.
    • aero142 3 hours ago
      They will add flooded streets to the training simulation and this problem will go away. Eventually, the corner cases not in the training simulation will be so corner they basically never happen. Waymo can be incredibly successful without dealing with "surprise clown parade" or whatever.
    • whimsicalism 3 hours ago
      this is absolutely already a thing under development, you can see Waymo is hiring for reasoning roles
    • moomoo11 3 hours ago
      how would a llm help

      maybe a little biological brain engineered to think it is a car with api access to the car hardware via the llm?

      imagine you get into the car and in the center console you just see a floating brain in vat like fallout

      • michaelt 3 hours ago
        The driving ML model will take care of the next 10 seconds of driving, in a fast loop deciding what steering and throttle commands to give.

        The LLM will apply the high level reasoning needed to deal with longer time horizons and complex decisions, like deciding that the best way to reach the car wash 100 yards away is by walking.

        • ydse 2 hours ago
          Lmao what…

          You sound like an econ prof: full of it and hand waving away with hypotheticals.

  • micromacrofoot 3 hours ago
    they should probably put some sort of metal strip into the roads that a vehicle can follow reliably, future iterations could make continuous contact to the strip to deliver power to these vehicles, and this would also allow them to become larger by reducing fuel weight or even allow cars to travel very close together for efficiency gains
    • eodecker 1 hour ago
      you are describing a train
      • llbbdd 1 hour ago
        That's the bit. For some reason trains come up on these threads all the time like it's some kind of gotcha alternative solution to driverless cars, forgetting that cars can go to your front door.
        • micromacrofoot 14 minutes ago
          having a decent train system in a city can cut car ownership in half, it's a solved technology we've had for 100 years but pretty much no one builds it because it's not some private ownership tech hype bullshit
  • cucumber3732842 3 hours ago
    Clearly they haven't actually had any serious problems getting stuck or anything because it'd be all over the news.

    I don't think they're barreling into foot+ deep water.

    I think they're driving into shallower "perfectly navigable but still deep" puddles at normal for the roads speed and this pizza delivery boy type behavior is making passengers clutch their pearls because they are expecting their robotaxi to drive like a high end chauffeur.

    • burkaman 3 hours ago
      > One of Waymo’s robotaxis was spotted driving through a flooded street in Atlanta, Georgia on Wednesday before it ultimately got stuck for about an hour, according to local news reports. The vehicle was recovered and removed from the scene, Waymo told TechCrunch. Waymo says it paused service in the city, just like it has in San Antonio, Texas, while it figures out a solution.
    • thebruce87m 3 hours ago
      Thousands of Waymos recalled after robotaxi swept into a creek https://www.bbc.co.uk/news/articles/cwy2011dl4xo

      > It follows an incident on 20 April in San Antonio, Texas, where an empty Waymo vehicle entered a flooded road and was swept into a creek.

      Nobody in it but sounds serious enough.

      • manwe150 3 hours ago
        That title sounds so much more dramatic than it seems it actually was. I imagine headlines like: “Billions of python 3.14.4 programs were recalled today when a bug was found in the core itself. No word yet on whether the successor product, Python 3.14.5, will avoid a similar fate. How long will we tolerate being used as test subjects in the developer’s risky games?”
        • burkaman 2 hours ago
          How would you phrase the headline? I think it's pretty accurate, they have pulled thousands of vehicles out of service and completely stopped service in two cities, and the reason is literally that one of their cars was swept into a creek (in addition to other flood-related incidents). I can't think of a way to make the headline any more clear.

          This isn't like other software "recalls" where the result is just an over-the-air update or a request to bring your car to a dealership when you have time, in this case they have actually physically removed the recalled vehicles from the road.

          To use your analogy: if a bug in Python caused the PSF and package managers to actually make 3.14.4 unavailable and companies started taking Python services offline until a fix was found, yes that would be a really big deal.

          • manwe150 39 minutes ago
            > This isn't like other software "recalls" where the result is just an over-the-air update or a request to bring your car to a dealership when you have time, in this case they have actually physically removed the recalled vehicles from the road.

            But that is what it was: the remedy in the recall was an over-the-air update and was already universally applied several weeks time before the recall was actually formalized.

            Also seems linguistically complex, since the dictionary meaning of recall is an "official order to return item to a manufacturer", but Waymo doesn't sell the vehicle itself.

    • thewebguyd 3 hours ago
      There was one in Atlanta that made the local news where it went too deep and stalled out, was stuck for over an hour.
  • maryamshafaqat 4 hours ago
    [dead]
  • ck2 3 hours ago
    does Waymo use Lidar or is it like Musk's "cost saving" cameras only
    • hoppyhoppy2 3 hours ago
      Waymo uses lidar. There's lots of information about it on the web.
    • jcims 3 hours ago
      The spinny things on the vehicle are LIDAR.
    • exmicrosoldier 3 hours ago
      Lidar is much less accurate in the rain.
  • LunicLynx 4 hours ago
    If they only would use lidar. Oh wait…
  • retrocryptid 3 hours ago
    I thought Weymo's were supposed to be "supervised" by humans in the Philippines. Maybe driving in circles in the suburbs and driving into flood waters happens only when the cars are out of mobile data range? Did Weymo pay their mobile phone bill? Does the (somewhat) autonomous system on the car decide when to flag a human for help? I would have expected a human to be watching all the time. Are they experiencing labor problems in the Philippines? Maybe Weymo doesn't want to pay their remote operators as much as the remote operators want to get paid?
    • OsrsNeedsf2P 3 hours ago
      Your assumption that Waymos are "(somewhat) autonomous" is wrong, which is why your questions and conclusion don't make any sense
      • jeffbee 2 hours ago
        It's an interesting illustration of how widely and quickly misinformation spreads, though.
  • Guestmodinfo 4 hours ago
    Maybe the solution is to put in more billions. Every fad creates jobs.
  • t1234s 2 hours ago
    What are the chances that google just shuts down waymo once they get whatever they need from it. Weren't there other ambitious projects under google that had a similar fate?