Radars are used to identify and track fixed or moving objects.
Radars could also be used to develop a Traffic monitoring system.
Low cost Radars, Like used by Traffic police to control Speeding vehicles, could be installed at high traffic areas. Data from these Radars can be sent in Real-time to a Centralized Server where it can be analyzed using a Software Program and Broadcasted using Internet.
This information can then be used to divert Traffic to alternate routes in case of Traffic Jams.