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Replaying real life: how the Waymo Driver avoids fatal human crashes

blog.waymo.com

71–80 of 182 posts

Re: Replaying real life: how the Waymo Driver avoids fatal human crashes

#71
post #16

Earlier quoted context omitted.

Figure 3 almost looks like the responder is lagging. Feels like it slows down and speeds up in several places. Assuming that’s not a gif/video rendering bug, it’s a great way to get rear-ended.

Here's the semi-annual reminder to everyone that you are probably following too closely, and this is exactly why you shouldn't. The rule of thumb is that you want 3-4 seconds between cars, which at highway speeds is 80-100 meters or yards. Yes, almost no one leaves that much room. That's part of why so many accidents happen. It's easy for you to do better.

"We suck at driving, you should compensate."

Nope. It's normal to expect technology to outdrive humans, not struggle to reach us.

Re: Replaying real life: how the Waymo Driver avoids fatal human crashes

#72
post #54

Earlier quoted context omitted.

If studies show that automatic emergency braking cuts down on deaths overall, I think it's a worthwhile tradeoff -- I'd even be happy to have it be mandatory/non-disableable. It sounds like the car you were driving had some kind of defective implementation of automatic emergency braking. That doesn't invalidate the good that these types of systems do when implemented properly. Also I'm wondering what kind of situatio…

I’m getting downvoted for voicing my opinion on a darling HN technology, is that it? Next time I’ll just keep my mouth shut (as I usually do because of the downvote brigade). This time, I’ll bite. I guess you guys have never driven in Africa. Or Asia. Braking is not always the best course of action is actually dangerous in some situations. Like if I can see someone screaming up behind me in the fast lane, there’s a c…

In near-critical situations there tend to be disjoint optima in how the group of participants need to behave in order to avoid an incident. If the automated system is programmed to prefer the more - hm how would you call it - calm, civilized, obedient "minimum", but the participants the more agressive one, I can feel your problem. Sometimes just squeezing through resolves a situation more directly and quickly. The designers of those systems are usually not allowed to prefer that. Even if the system would recognize it properly (which needs much more processing power, because the search space is much bigger and, as mentioned, non-convex.

I don't think you should be downvoted, because that is one of the core ethical aspects we need to discuss about those systems. And how they interact with humans. SV dystopia "soon there won't be humans in the loop" doesn't help here.

Re: Replaying real life: how the Waymo Driver avoids fatal human crashes

#73

Earlier quoted context omitted.

>The rear-ending problem will be solved as automatic emergency braking becomes standard on cars. Already, it's shipping on almost all high-end cars and 70-80% of midrange cars. There's a US auto industry goal of it being standard by 2022. That's probably the main feature needed for self-driving cars to coexist with human-driven cars. I really wish we could just enforce proper education of being observant. Most times…

> I really wish we could just enforce proper education of being observant. I know we're talking about California here, but the other straightforward explanation is that self driving cars are braking unpredictably compared to regular traffic, possibly when other drivers have judged that they wouldn't possibly need to brake. Such accidents are only the fault of the rear car in a simplistic prima facie sense. Unexpected…

That's better performance than most humans. Look at 16th and Market.[1] It's a 6-way intersection. Visibility to the left is very poor. The stop line is half a block back from Market Street. It's not even visible that there's a second street coming in from the left.

The Waymo planner is very aware of where its scanning is blocked, and makes worst-case assumptions about what it can't see. The mapping system knows there are 6 streets here, one of which is totally hidden at intersection entry.

It's permitted to turn right on red from northbound Noe to Market, but not from northeast-bound Market to 16th. So traffic from Noe gets stuck in its dedicated turn lane within the intersection. That traffic is supposed to wait and turn right, but it's quite possible that Waymo's system doesn't trust it to do so. This intersection also has dedicated bike lanes and a streetcar track. It had 7 accidents with 4 injuries in 2018.

It's hard to fault Waymo's system for cautious driving in that intersection.

[1] https://earth.google.com/web/@37.76429991,-122.43305656,39.4...

Re: Replaying real life: how the Waymo Driver avoids fatal human crashes

#74

This is really cool. I suspect that when we have self driving cars, it's going to take off very quickly due to insurance. In particular, if you are in a non self driving car and in an accident with a self driving one, it'll be hard to not be shown as at fault. So insurance I would guess go up based on the percentage of self driving cars, and likely be really cheap for self driving cars. I wonder if there's a period t…

So who's going to pay for that? Tesla? No, tech companies will just hide a "Not actually self-driving, driver takes full responsibility" sticker near the VIN. It'll be easy to blame the human for negligence then.

It's easy to be cynical. Volvo has already said they take responsibility [0], and I assume other manufacturers will also accept blame if their self-driving was involved.

0 - https://www.caranddriver.com/news/a15352720/volvo-will-take-...

Re: Replaying real life: how the Waymo Driver avoids fatal human crashes

#75
post #74

Earlier quoted context omitted.

So who's going to pay for that? Tesla? No, tech companies will just hide a "Not actually self-driving, driver takes full responsibility" sticker near the VIN. It'll be easy to blame the human for negligence then.

It's easy to be cynical. Volvo has already said they take responsibility [0], and I assume other manufacturers will also accept blame if their self-driving was involved. 0 - https://www.caranddriver.com/news/a15352720/volvo-will-take-...

Volvo is the exception, not the rule, when this should obviously be the rule.

So I'll believe that when I see it. Tesla will be one of the last holdouts for sure.

Re: Replaying real life: how the Waymo Driver avoids fatal human crashes

#76
They can use it to start fixing the roads, not the cars.

Just look at the cross intersection they use as an example, typical of the US. The ROAD is the death trap there. People are crossing each other at high speed, this is the BUG, and should be fixed.

The proper solution is putting there a roundabout, and you will have instantly less fatal accidents.

The US was the first to use roundabouts, but those early designs did not work well, and as a result we have those monstrosities like in the picture all around the US.

With electric cars that record accidents, the first bugs that we should fix are those in the roads, like those concrete barriers that have no smooth transition but a front wall out of nowhere.

Re: Replaying real life: how the Waymo Driver avoids fatal human crashes

#77
post #38
post #35

Earlier quoted context omitted.

I suspect the adoption process will be slow because consumers really don't want this product. Self driving cars will drive the speed limit and infuriate both other motorists and their owners who are getting passed by speeding human driven cars. There will also be well publicized stories of the few times that self driving cars perform worse than humans. All drivers think they are above average and therefore the statis…

> because consumers really don't want this product > Self driving cars will drive the speed limit Tesla is proving both to be false, today.

Tesla's aren't self driving. They are helping humans drive. For a Tesla to not drive the speed limit it would have to either be told to do so or fail.

Re: Replaying real life: how the Waymo Driver avoids fatal human crashes

#78
post #73

Earlier quoted context omitted.

> I really wish we could just enforce proper education of being observant. I know we're talking about California here, but the other straightforward explanation is that self driving cars are braking unpredictably compared to regular traffic, possibly when other drivers have judged that they wouldn't possibly need to brake. Such accidents are only the fault of the rear car in a simplistic prima facie sense. Unexpected…

That's better performance than most humans. Look at 16th and Market.[1] It's a 6-way intersection. Visibility to the left is very poor. The stop line is half a block back from Market Street. It's not even visible that there's a second street coming in from the left. The Waymo planner is very aware of where its scanning is blocked, and makes worst-case assumptions about what it can't see. The mapping system knows ther…

> That's better performance than most humans

I don't know how you can blindly assert that with the limited details in the accident report. I agree that type of intersection is a bit of a free for all, but that doesn't really inform judgement of how Waymo handles it.

My overall point is that city driving necessarily involves a bit of assuming that cars coming at you that are supposed to stop are going to stop. And I can completely see an autonomous vehicle company programming their cars to be overly cautious, and not being tolerant of others cars with just a little too much velocity for comfort (the kind that give your passenger white knuckles, but you have to tolerate as a driver) - as you said, making worst case assumptions rather than average assumptions.

I don't have any personal experience being around self driving vehicles, but in this very thread are people referencing the idea that a self driving car would stop, accelerate to move forward a few feet, and then come to a quick stop again - that's liable to be completely antisocial and unintuitive for other road users. A following driver should be able to handle that and even foresee it based on the car's movement pattern (the car they're following could just as easily be someone looking down at their phone), but continually putting this to the test is questionable.

If we could look at a video of that accident I referenced, it's possible we would see the Waymo doing something absolutely boneheaded like suddenly slamming on its brakes for no reason. It's also possible we would see the Waymo behaving completely reasonably, and the following driver spacing out. My point is that it's impossible to know from such limited reports, and it's a mistake to assume that being hit from behind automatically absolves the autonomous vehicle.

Your original comment did not directly claim that, but it did sort of imply it while stating the solution is for other cars to develop automatic braking, even though that's a long ways off for most cars on the road.

Re: Replaying real life: how the Waymo Driver avoids fatal human crashes

#80
post #18

You can read the California DMV's set of autonomous vehicle accident reports.[1] Almost all the Waymo reports are "vehicle was entering intersection, detected cross traffic, stopped, was rear-ended by human driver". There's one Waymo report where someone ran a stop sign and hit them. The rear-ending problem will be solved as automatic emergency braking becomes standard on cars. Already, it's shipping on almost all hi…

> Almost all the Waymo reports are "vehicle was entering intersection, detected cross traffic, stopped, was rear-ended by human driver". There's one Waymo report where someone ran a stop sign and hit them.

I've driven some some recent cars with a lot of safety systems and more advanced cruise control and they always felt like a bad human driver. They seem to be unpredictable and abuse the breaks, especially when driving on highways where you should just drive with the flow and look in front of you to see what's going on at least 2 or 3 cars ahead of you. I don't know why I have the feeling that technically the Waymo cars are behaving like they should, but some of their actions are just too unpredictable or come all of the sudden, surprising the drivers behind them with sudden breaks and actions that a human driver wouldn't do, or would be more predictable at it.

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