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xkcd #2841: Sign Combo
(imgs.xkcd.com)
How to segfault an autonomous vehicle.
Someone will at some point try this for sure
Actually I'd think handling unclear situations like this would be one of the major things that makes autonomous driving systems so complicated and challenging to develop.
You are completely correct. The "happy path" or what to do if everything goes right is fairly straightforward for autonomous cars. It's when it gets into exceptions or unexpected scenarios like this that it becomes a problem. It's a car so you can't just stop it in the middle of the road, but you cant tell it to ignore road signs either
I knew printing your own signs would lead to interesting exploits, but this is just next level.
Putting it into reverse requires you to stop first.
i think you could theoretically drift to maintain velocity in a different axis while accelerating in reverse to technically not ever "stop"
How would that work?
Welcome to Germany
I'd just drive off the road to the right. Where I'm going, I don't need rules. I may need new tires, though...
And suspension, shocks, axel, exhaust, undercarriage...
You could reverse down the road, or would there be a moment between forwards and backwards when you're stopped?
It's not a u-turn if you skid into a wicked 540
Knight Rider vibes.
You have to cross over 0 at some point
Stopping isn't the same as driving at 0 speed.
A car is stopped if and only if its acceleration is also 0.
And velocity is 0. Otherwise Johnny 100kmph is technically stopped
That's why I put a sneaky 'also' in my comment
signs may only apply to the road after them, so you could validly stop just before it.
My thoughts exactly; problem solved. Just do what the first sign says before the others apply.
Somewhat more sophisticated version of a one-way cul-de-sac.
What concerns me the most is the no uturn followed by road that says you can pass and in theory u turn
Time to go off-roading.
Is this an auditor trap?
Well clearly they want you to drive sideways
reverse
Sliiiide to the left!
alt text is supposed to describe the image for people who are visually impaired, that's just a caption
edit: didn't know what I was talking about, xkcd has a specific thing called alt text that's different from what I was describing, my bad lol
Alt text on XKCD posts is the label that displays when you hover over the post on their website, it's not something that the user has added.
oh dang my bad didn't realize it had an xkcd specific meaning, thx for correcting me!
this post was submitted on 14 Oct 2023
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