Development of a Crashworthy Tangent End Treatment for Low-Speed and Curbed Roadways

Where roadside safety barriers are desired in low-speed environments, low-profile barriers designed to address crash risks at lower speed conditions (MASH TL-2) are often favored because they are more compatible with the community context. Yet the space available for crashworthy end treatments for these barriers can be highly constrained in many urban and suburban locations because of closely spaced intersections and driveways, limited right-of-way, and the presence of street trees and other features. In addition, the presence of vertical curbs and adjacent sidewalks or multiuse paths restrict the use of a flared end treatment. Rural locations can have similar constraints and conditions, even without the presence of a curb.  The objective of the research is to develop a nonproprietary, crashworthy tangent end treatment with the following characteristics: appropriate for urban and suburban environments; of minimal required length, width, and height; can be transitioned to commonly used rigid barriers (e.g., TL-2 low profile or TL-3 concrete barriers); and can be placed on top of a 6” curb or placed where there is no curb in advance of the barrier.


  • English


  • Status: Active
  • Funding: $749954
  • Contract Numbers:

    Project 22-52

  • 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:

    Turner, Anne-Marie

  • Performing Organizations:

    George Mason University

    Fairfax, VA  United States  22030
  • Principal Investigators:

    Marzougui, Dhafer

  • Start Date: 20231109
  • Expected Completion Date: 20261108
  • Actual Completion Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 01772929
  • Record Type: Research project
  • Source Agency: Transportation Research Board
  • Contract Numbers: Project 22-52
  • Files: TRB, RIP
  • Created Date: May 25 2021 10:20PM