  Using a recently developed microscopic traffic model, we simulate how speed
limits, on-ramp controls, and vehicle-based driver-assistance systems influence
freeway traffic. We present results for a section of the German Autobahn
A8-East. Both, a speed limit and an on-ramp control could considerably reduce
the severeness of the originally observed and simulated congestion. Introducing
20% vehicles equipped with driver-assistance systems eliminated the congestion
almost completely
