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Bode Lecture: Reducing Highway Congestion: An Empirical Approach

The California Freeway Performance Measurement System (PeMS) database stores real-time data from 26,000 loop detectors. PeMS extracts useful information from these data and displays it in graphical or tabular form. The data provide an unparalleled opportunity to assess highway performance and discover ways to improve highway management. The talk illustrates this opportunity by suggesting approaches to reduce congestion. The approaches range from bottleneck identification and effective ramp metering to questioning the current operation of high-occupancy vehicle or carpool lanes.