Freeway Travel Time Reliability Stochastic Models Development

A traffic data warehouse with extensive amounts of loop detector traffic counts, and vehicle speeds was utilized to develop statistical models for evaluating the performance of the I-4 corridor in Orlando, Florida in terms of travel time reliability. Four different travel time stochastic models: Weibull, Exponential, Lognormal, and Normal were investigated. The developed best-fit stochastic model (Lognormal) can be used to estimate travel time reliability of freeway corridors and report this information to the public through traffic management centers. The new method was compared to the existing methods (Florida method and Buffer Time method). Unlike the existing methods, which were insensitive to the traveler’s perspective of travel time, the new method showed high sensitivity to the geographical location that reflects the level of congestion and bottlenecks. Also, it is more appropriate for measuring the performance of transportation facilities.


  • English

Media Info

  • Media Type: CD-ROM
  • Features: Figures; References; Tables;
  • Pagination: 22p
  • Monograph Title: TRB 86th Annual Meeting Compendium of Papers CD-ROM

Subject/Index Terms

Filing Info

  • Accession Number: 01043551
  • Record Type: Publication
  • Report/Paper Numbers: 07-0289
  • Files: TRIS, TRB
  • Created Date: Feb 8 2007 4:50PM