Comment on Waymo issued a recall after two robotaxis crashed into the same pickup truck
bstix@feddit.dk 7 months ago2.5 seconds at 60 mph is more than enough to come to a full stop. If the car in front of you dropped an anvil (traveling at 0 mph) on the road, you could stop before crashing into the anvil. You do not need to drive into the other cars trajectory path.
NotMyOldRedditName@lemmy.world 7 months ago
You can’t be driving behind that vehicles at 60mph with 2.5s WITHOUT knowing it’s trajectory.
You keep trying to saying it doesn’t need to know the trajectory of all objects around it, but that’s not true.
bstix@feddit.dk 7 months ago
Yes you can. It is a stopping distance. 2.5 seconds at 60 mph is 220 feet. A car can brake from 60 to 0 in less than 220 feet. It will take longer than 2.5 seconds to do, but it won’t hit the object which originally was 2.5 seconds ahead.
NotMyOldRedditName@lemmy.world 7 months ago
Maybe a straight behind isn’t as good an example, although it is calculating the likelihood of it continuing to go straight.
An oncoming car, drifting out of the lane towards your lane.
It’s not going to hit you until it’s in your path, but the trajectory of it coming towards you is in your path.
If you don’t consider where it’s going and how fast it’s going, you won’t know if it’s going to enter your lane before you pass it.
If you’re only trying to avoid hitting objects and its not in your path until the last quarter second, you won’t take appropriate actions because you don’t know it’s coming at you.
All these measurements are taken as time between you and them and it uses that info to calculate the trajectories.
bstix@feddit.dk 7 months ago
Yes I know and it should. What I am saying is that the trajectory calculations should never be allowed to override the basic collision calculations, like it did in this case.
It does not matter if the towed truck appeared to have a different trajectory than it actually had, because it was very obviously in the range of collision.
Do you have a reverse sensor in your car that beeps when you’re close to stuff?
It was the self driving car that drove into the tow truck. All it’s sensors must’ve been beeping, and it still decided to keep driving.