Enhancing Curve Advisory Speed and Curve Safety Assessment Practices

The Texas Department of Transportation (TxDOT), also referred to as TxDOT, is in the process of conducting several parallel efforts to evaluate rural highway horizontal curves. Following the adoption of the 2011 Texas Manual on Uniform Traffic Control Devices (TMUTCD), district personnel are checking and updating posted curve advisory speeds and other curve traffic control devices (e.g., Chevrons) in response to the December 31, 2019 compliance date. Recent legislation has allowed regulatory speed limits to be increased to 75 miles per hour (mph) on some rural highways, resulting in a need to check and evaluate curves that had not previously been signed with advisory speeds. There is also renewed interest in implementing pavement friction treatments through the Highway Safety Improvement Program (HSIP). In this research project, the researcher team will collect and analyze data so TxDOT’s curve advisory speed setting procedures can be extended to rural multilane highways and freeways as well as two-lane rural highways with speed limits of 75 mph. The researcher team will also improve TxDOT’s global positioning system (GPS)-based system’s capabilities to measure grade. Finally, the researcher team will draft a Horizontal Curve Evaluation Handbook to aid TxDOT’s practitioners in using the GPS-based system for evaluating curves.


  • English


  • Status: Active
  • Contract Numbers:


  • Sponsor Organizations:

    Texas Department of Transportation

    125 E. 11th Street
    Austin, TX  United States  78701-2483
  • Project Managers:

    Jensen, Darrin

  • Performing Organizations:

    Texas Transportation Institute

    Texas A&M University System
    3135 TAMU
    College Station, TX  United States  77843-3135
  • Principal Investigators:

    Pratt, Michael

  • Start Date: 20170901
  • Expected Completion Date: 20190228
  • Actual Completion Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 01648625
  • Record Type: Research project
  • Source Agency: Texas Department of Transportation
  • Contract Numbers: 0-6960
  • Files: RiP, STATEDOT
  • Created Date: Oct 20 2017 11:46AM