I guess the current lane-assisting and adaptive cruise control systems don't do anything at all. Most cars only have ultrasonic parking sensors in the back and

I guess the current lane-assisting and adaptive cruise control systems don't do anything at all. Most cars only have ultrasonic parking sensors in the back and probably a parking camera which both don't have any range. They probably rely on the fact that vehicles behind them should drive in the normal safety distance and that following cars are responsible for avoiding rear end collisions.