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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.
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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.
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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)

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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".
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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.

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Getting banned from driving is extremely rare. Most people convicted of DUI are still allowed to drive.
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Maybe. But insurance rates, and the government's enforcement of laws, are based on analytics, and overcome a lot of human emotional bias.
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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.

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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.

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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.
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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.
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this is absolutely already a thing under development, you can see Waymo is hiring for reasoning roles
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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

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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.

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Lmao what…

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

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