Development of Longitudinal Barriers for Use on High-Speed Roadways

The 82nd Texas Legislature amended Section 545.353 of the Transportation Code by adding Subsection (h-2), which permits speed limits up to 85 miles per hour on parts of the state highway system. An 85 mph speed limit can be posted if an engineering and traffic investigation determines that the speed limit is reasonable and safe for that part of the highway system. Longitudinal barriers (e.g., guardrails, median barriers, bridge rails) are currently tested and evaluated at a design impact speed of 62 mph. For economic reasons, many existing barrier systems are optimized for the current design impact conditions and have little or no factor of safety for accommodating more severe impacts. New or modified barrier designs may be required to maintain the desired level of safety for motorists traveling on high-speed sections of highway. Under The Texas Department of Transportation (TxDOT) research project 0-5544, recommended design impact speeds for high design speed roadways were derived and can be used in this project. The scope of the project includes consideration of longitudinal barrier systems. Other devices such as crash cushions and guardrail end terminals are proprietary in nature and the upgrading of these systems for use on high-speed roadways can be accomplished by their respective manufacturers.


  • English


  • Status: Completed
  • Contract Numbers:


  • Sponsor Organizations:

    Texas Department of Transportation

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

    Pete, Kevin

  • Performing Organizations:

    Texas A&M Transportation Institute

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

    Bligh, Roger

  • Start Date: 20120901
  • Expected Completion Date: 0
  • Actual Completion Date: 20140831
  • Source Data: RiP Project 33833

Subject/Index Terms

Filing Info

  • Accession Number: 01530226
  • Record Type: Research project
  • Source Agency: Texas Department of Transportation
  • Contract Numbers: 0-6771
  • Files: RiP, STATEDOT
  • Created Date: Jul 11 2014 1:01AM