This guy did a fantastic mini-study of traffic wave systems, and has worked out techniques that go one step further than what your describing - actively cancell

This guy did a fantastic mini-study of traffic wave systems, and has worked out techniques that go one step further than what your describing - actively cancelling out traffic jams by allowing cars to freely change lanes for a long distance ahead of you. http://amasci.com/amateur/traffic/trafexp.html http://amasci.com/amateur/traffic/trafexp.html