Freeway performance measurement system : an operational analysis tool
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2001-07-30
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Abstract:PeMS is a freeway performance measurement system for all of California. It processes 2
GB/day of 30-second loop detector data in real time to produce useful information. Managers
at any time can have a uniform, and comprehensive assessment of freeway performance.
Traffic engineers can base their operational decisions on knowledge of the current state of the
freeway network. Planners can determine whether congestion bottlenecks can be alleviated
by improving operations or by minor capital improvements. Travelers can obtain the current
shortest route and travel time estimates. Researchers can validate their theory and calibrate
simulation models.
The paper describes the use of PeMS in conducting operational analysis, planning and
research studies. The advantages of PeMS over conventional study approaches is
demonstrated from case studies on conducting freeway operational analyses, bottleneck
identification, Level of Service determination, assessment of incident impacts, and evaluation
of advanced control strategies.
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