Evaluate Safety End Treatments for Roadside Drainage Structures

Drainage is a critical element of roadside design and often calls for the use of cross-drainage and parallel-drainage culverts. If untreated, the ends of the drainage structures can become roadside hazards that can result in serious injury when an errant vehicle leaves the roadway. The most cost-effective strategy is often to make the culvert end traversable using grates comprised of pipe runners across the culvert end. The research team will investigate the safety performance of traversable cross-drainage and parallel-drainage culvert end treatments installed on roadside slopes. The research team will address the various design variations of safety end treatments supported by current standards to investigate the safety performance. The research team will develop design guidance to recommend slopes and size, length, and spacing of the pipe runners for both cross-drainage and parallel-drainage culverts that comply with the American Association of State Highway and Transportation Officials (AASHTO) Manual for Assessing Safety Hardware (MASH). The research team will use full-scale crash testing to aid with validating the design guidance.


  • English


  • Status: Active
  • Funding: $863760
  • Contract Numbers:


  • Sponsor Organizations:

    Texas Department of Transportation

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

    Dassi, Martin

  • Performing Organizations:

    Texas A&M Transportation Institute

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

    Cakalli, Sofokli

  • Start Date: 20230901
  • Expected Completion Date: 20260831
  • Actual Completion Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 01894812
  • Record Type: Research project
  • Source Agency: Texas Department of Transportation
  • Contract Numbers: 0-7179
  • Files: RIP, STATEDOT
  • Created Date: Sep 27 2023 2:29PM