There are regular 100+ car pileups in the central California valley due to fog. Cars crash in a lot of situations because the driver simply can't see. We need something better than vision to avoid these kinds of accidents.
Coordinated cars won't work unless all cars are built the same and all maintained 100% the same and regularly inspected. You can't have a car driving 2 inches from the car in front, if it can't stop just as fast as the car in front. People already neglect their cars, change brake compounds, and get stuck purchasing low quality brake parts due to lack of availability of good components.
Next time you see some total beater driving down the road, imagine that car 2 inches off your rear bumper, not even a computer can make up for poor maintenance. Imagine that 8000lb pickup with it's cheap oversized tires right in your rearview mirror with it's headlights in your face. It's not going to be able to stop either.
A combination of cameras, lidar, ridar, ultrasonic fused together have a strong sense of perception since they fill in each other's gaps. (short, long, different spectrums of electro-magnetic spectrum / sound).
The good news is they're all commodity hardware prices now.
Tesla removing radar and parking ultrasonic sensors was a self own. Computer vision inference is pretty bad when all the camera sees is a while wall when backing up.
Fog - Radar will perceive the car. Multi car crash, long range radar picks it up.
Bright glare from sun, lidar picks it up. Lidar misses something, camera picks it up.
Waymo has the correct approach on perception. Jam with sensor so they have superhuman vision of environment around.
Coordinated cars won't work unless all cars are built the same and all maintained 100% the same and regularly inspected. You can't have a car driving 2 inches from the car in front, if it can't stop just as fast as the car in front. People already neglect their cars, change brake compounds, and get stuck purchasing low quality brake parts due to lack of availability of good components.
Next time you see some total beater driving down the road, imagine that car 2 inches off your rear bumper, not even a computer can make up for poor maintenance. Imagine that 8000lb pickup with it's cheap oversized tires right in your rearview mirror with it's headlights in your face. It's not going to be able to stop either.