An Empirical Assessment of Traffic Operations
نویسندگان
چکیده
The California Freeway Performance Measurement System stores real-time data from 26,000 loop detectors. PeMS is accessed via an internet browser (http://pems.eecs.berkeley.edu/). It currently has 3 TB of data, growing at 2 GB/day. PeMS extracts useful information from these data and displays it in graphical or tabular form. These data provide an unparalled opportunity to assess freeway performance and suggest ways to improve freeway management. The paper illustrates this opportunity using six studies of freeway congestion, ranging from bottleneck identification to HOV lane effectiveness. The paper is not a contribution to theory, but it may encourage theoreticians to use a rich data set to formulate and address practical questions.
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