On June 5, 1985, a comprehensive, computer-controlled traffic management system (TMS) was implemented on a section of 1-95 and 1-395 in Northern Virginia. The roadway is a major commuter route into the District of Columbia. A before-and-after evaluation of the TMS was initiated by the Virginia Department of Transportation in the spring of 1983 in anticipation of a summer 1983 implementation. Due to a series of events, the TMS was two years late in being implemented, and data were not collected after its implementation until the spring of 1986. Accordingly, this study describes changes in travel characteristics between these two periods; it recognizes that several major events occurred that likely caused the changes. Changes in travel on local streets as well as on the interstate are described. Changes in traffic volumes, speeds, travel times, delays, vehicle miles of travel, vehicle hours of travel, and accidents are reviewed. Finally, information on incident detection and management is presented.
Congestion on our nation's highways, most commonly found in urban areas, is a serious problem that is growing steadily worse. While Virginia is predom...
This study addresses the problem of queueing on highway facilities, wherein a large number of computerized methods for the analysis of different queue...
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United States Department of Transportation
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