Not going to happen. Not in our lifetimes. Human reactions times are not why cars keep their distance from each other. Even with perfect communication, perfect knowledge, a large number of cars that close together is extremely dangerous. Any small fault, a squirrel running into the road, will cascade into something major. All those little spaces between vehicles allow the system to iron out such things without impacting everyone.
We could see small trains of autodrive vehicles tailgating each other on highways, but not huge trains of random participants. The incremental advantage is far outweighed by the associated risks.
What will acceptable de-confliction space be? Ten seconds? Five? One? If you are a passenger in a car approaching an intersection, exactly how close do you want to be to the truck about to t-bone you?
We could see small trains of autodrive vehicles tailgating each other on highways, but not huge trains of random participants. The incremental advantage is far outweighed by the associated risks.
What will acceptable de-confliction space be? Ten seconds? Five? One? If you are a passenger in a car approaching an intersection, exactly how close do you want to be to the truck about to t-bone you?