Safety Performance Evaluation of Weak-Post, W-Beam Guardrail Attached to Culvert

A new W-beam guardrail system for use on low-fill culverts was developed and evaluated. The system was adapted from the Midwest Guardrail System (MGS) bridge railing for attachment to the outside face of culvert headwalls. Four attachment concepts were developed and evaluated through dynamic component testing. Both lateral and longitudinal impacts were conducted on the design concepts while mounted to a simulated concrete culvert headwall. The resulting damage from each test was confined to post bending only. Although all four designs prevented damage to the socket assembly and culvert headwall, the top-mounted, single-anchor design and the side-mounted design were recommended for use based on ease of fabrication and installation. The new weak-post, W-beam guardrail system for attachment to low-fill culverts was designed with multiple advantages over current culvert treatments. The guardrail system is mounted to the outside face of the headwall, thereby minimizing intrusion over the culvert and maximizing the traversable roadway width. The barrier has an unrestricted system length and does not require a transition when attached to standard MGS. Additionally, the attachment configurations were designed utilizing epoxy anchors, enabling the system to be installed on new or existing culverts. Finally, implementation guidance was provided for new system installations.

  • Record URL:
  • Corporate Authors:

    University of Nebraska, Lincoln

    Midwest Roadside Safety Facility
    2200 Vine Street, Whittier Building
    Lincoln, NE  United States  68583-0853

    Nebraska Department of Roads

    Midwest States Regional Pooled Fund Program,
    1500 Nebraska Highway 2
    Lincoln, NE  United States  68502

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Schneider, Allison J
    • Rosenbaugh, Scott K
    • Faller, Ronald K
    • Sicking, Dean L
    • Lechtenberg, Karla A
    • Reid, John D
  • Publication Date: 2014-2-12


  • English

Media Info

  • Media Type: Digital/other
  • Edition: Final Report
  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 180p

Subject/Index Terms

Filing Info

  • Accession Number: 01529387
  • Record Type: Publication
  • Report/Paper Numbers: TRP-03-277-14
  • Contract Numbers: TPF-5(193) Supplement #32
  • Created Date: Jun 3 2014 1:55PM