Algorithms to Convert Basic Safety Messages into Traffic Measures

Connected vehicles rely on short-range messaging using Basic Safety Message (BSM) data that includes information about vehicle size, speed, position, and heading (direction). In the future, all vehicles will be expected to send and receive this information to enhance safety and mobility. Exchange of BSM data among vehicles and traffic management systems will have the potential to generate traffic information that could be used to support current or develop new traffic measures such as travel time, end of queue information for work zones, road weather delay impact, and enhanced traffic signal control. This will be particularly valuable for arterial roadways and work zones in areas without instrumentation or where transportation systems management instrumentation is disrupted by construction. The aim of this research was to develop and validate algorithms that will use BSM data to estimate selected traffic measures that could be used for performance monitoring, traffic control, and traveler information. The final report NCHRP Research Report 997 Algorithms to Convert Basic Safety Messages into Traffic Measures and a PowerPoint presentation are available for immediate use. Source code and additional software documentation may be found via Dropbox and on GitHub.


  • English


  • Status: Completed
  • Funding: $400000
  • Contract Numbers:

    Project 03-137

  • Sponsor Organizations:

    National Cooperative Highway Research Program

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

    American Association of State Highway and Transportation Officials (AASHTO)

    444 North Capitol Street, NW
    Washington, DC  United States  20001

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Project Managers:

    Crichton-Sumners, Camille

  • Performing Organizations:

    Noblis, Incorporated

    Reston, VA  United States 
  • Principal Investigators:

    Vasudevan, Meenakshy

  • Start Date: 20190801
  • Expected Completion Date: 20211130
  • Actual Completion Date: 20211130

Subject/Index Terms

Filing Info

  • Accession Number: 01669537
  • Record Type: Research project
  • Source Agency: Transportation Research Board
  • Contract Numbers: Project 03-137
  • Files: TRB, RIP, USDOT
  • Created Date: May 21 2018 9:50PM