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Research Reports

Central Puget Sound Freeway Network: Usage and Performance

Description: This report presents a summary of general measures of facility usage (e.g., how many vehicles are transported on the freeway network) and facility performance (e.g., how fast they are traveling , where and how often congestion occurs). These measures are meant to be succinct, yet provide sufficient detail to convey a sense of the complexity of highway performance variations as a function of location, time, and other conditions. In addition this analysis is designed to be repeatable, i.e., the report's contents can be updated periodically with a consistent set of measures so that trends can be monitored over time.

  • Date Published: March, 1999
  • Publication Number: WA-RD 466.1
  • Last Modified: May 21, 2007
  • Authors: John M. Ishimaru, Mark E. Hallenbeck.
  • Originator: Washington State Transportation Center (TRAC)
  • # of Pages: 86 p., 1,165 KB (PDF)
  • Subject: Freeways, High occupancy vehicle lanes, Highway traffic control, Monitoring, Performance, Traffic congestion, Traffic speed, Traffic surveillance, Traffic volume, Urban areas.
  • Keywords: Congestion, freeway, measurement, HOV, reversible lanes, vplph, peak hour, peak volume, Puget Sound Region, Seattle, Tacoma, I-5, I-90, floating bridges, volume per lane per hour.
  • Related Publications:


This abstract was last modified April 29, 2008