Methodology for Estimating the Value of Travel Time Reliability for Truck Freight System Users

Travel time reliability is frequently cited as an important metric for the trucking community and other users of truck freight services. Travel time reliability for all vehicles is commonly measured and reported as a percentile or average (mean) travel time, but currently there is no consensus on how to value travel time reliability for just trucks, thus it has not yet been incorporated into the benefit estimation. Travel time reliability needs to be incorporated into the truck freight benefit estimation in order to fully capture truck freight benefits associated with mobility projects and provide quantitative data for project prioritization. The methodologies that would be developed could be applied to any region of interest and the need for quantitative data for prioritization of freight projects is a national level issue. Research by Washington State DOT has been completed to develop a methodology to quantify the truck freight benefits associated with mobility projects by taking into account changes in truck travel time, operating cost, and emissions in order to calculate economic impacts such as changes in gross state and regional product and long-term employment. The results of this research may be applicable to other states (with some data and modeling requirements). However, the research was unable to incorporate truck freight travel time reliability into the benefit estimation due to a lack of resources. While the importance of reliability is well established for passenger and freight travel, the value of reliability for truck freight system users is not. A methodology to estimate the value of travel time reliability for truck freight applications should be developed and demonstrated. The methodology should be applicable across a range of truck freight system users and sensitive to commodity types. The objective of this research is to develop and demonstrate a methodology to estimate the value of travel time reliability to truck freight system users in order to assist in the evaluation of proposed highway infrastructure and operations investments.


  • English


  • Status: Completed
  • Funding: $199796.00
  • Contract Numbers:

    Project 08-99

  • Sponsor Organizations:

    National Cooperative Highway Research Program

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC  United States  20001

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590

    American Association of State Highway and Transportation Officials (AASHTO)

    444 North Capitol Street, NW
    Washington, DC  United States  20001
  • Performing Organizations:


  • Principal Investigators:

    Hirschman, Ira

  • Start Date: 20140501
  • Expected Completion Date: 20150930
  • Actual Completion Date: 20150930

Subject/Index Terms

Filing Info

  • Accession Number: 01736448
  • Record Type: Research project
  • Source Agency: Transportation Research Board
  • Contract Numbers: Project 08-99
  • Files: TRB, RIP
  • Created Date: Apr 20 2020 5:03PM