Travel Time Standard Score as A New Measure of Travel Time Reliability

In this paper, travel time standard score (TTSS) is proposed as a new measure of travel time reliability. Here each single travel time data from an ETC (Electronic Toll Collection) system is transferred to a TTSS value, based on the average and standard deviation of historical travel times. Distributions of the TTSS at a certain time period are then used to evaluate the travel time reliability performance. The result shows that TTSS distribution is more sensitive to the accident happening situation than the traditional measures of travel time reliability, such like 95 percentile travel times. In addition, it has a potential to be used as a tool to better evaluate the influence of travel time reliability experience on individual drivers' future behavior.


  • English

Media Info

  • Media Type: DVD
  • Features: Figures; References; Tables;
  • Pagination: 17p
  • Monograph Title: TRB 89th Annual Meeting Compendium of Papers DVD

Subject/Index Terms

Filing Info

  • Accession Number: 01153549
  • Record Type: Publication
  • Report/Paper Numbers: 10-2812
  • Files: BTRIS, TRIS, TRB
  • Created Date: Jan 25 2010 11:22AM