Causes of Freeway Productivity Decline and the Opportunities for Gain: A Quantitative Study

Work done under TO 5306 led to three accomplistments. First, a measure of freeway productivity was proposed. Second, the causes of productivity decline led to the notion of "congestion pie." Both productivity loss and congestion pie are available at PeMS applications. Third, the study entitled "An Empirical Assessment of Traffic Operations" [1] provides a detailed empirical account of congestion.