Traffic information, including traffic flow information and traffic
incident information, obtained through a traffic management system for
providing and facilitating the exchange of traffic information between a
remote location and a vehicle may be presented to a user on a user
display in the vehicle. In one embodiment, traffic information provided
to a vehicle navigation device is refined by comparing the average speed
of the vehicle against the average speed of other vehicles traveling
along the same road. In another embodiment, the operation of a traffic
signal is controlled based, in part, on the current traffic flow and
distance from the traffic signal to alleviate traffic congestion.