Adaptive cruise control has been on high end cars for over a decade - http://en.wikipedia.org/wiki/Autonomous_cruise_control_system http://en.wikipedia.org/wiki

Adaptive cruise control has been on high end cars for over a decade - http://en.wikipedia.org/wiki/Autonomous_cruise_control_system http://en.wikipedia.org/wiki/Autonomous_cruise_control_syste.... It would be good to see it standardized as it can significantly reduce traffic congestion that's caused by over braking. I think BMW claimed that this would be happen if more than 30% of cars had the feature.