Traffic operations techniques and systems are needed that can substantially reduce urban traffic congestion. Advanced technologies such as motorist communications, information and navigation systems, vehicle guidance, control systems and others are tools that can be used to improve traffic operations.

The objectives of this research were to (1) identify and assess the most promising advanced technologies and systems that can improve urban highway traffic operations by achieving significant increases in capacity and traffic flow; and (2) for the most promising of these technologies and systems, formulate a plan for research, development, testing, and demonstration.

All work has been completed and the final report has been published as NCHRP Report 340, "Assessment of Advanced Technologies for Relieving Urban Traffic Congestion."