Current American Association of State Transportation and Highway Officials (AASHTO) criteria for safety-treating fixed roadside hazards suggest that all culverts within a certain clear distance of the edge of the traveled way be shielded by a roadside barrier. This is not necessarily a cost-effective solution for low volume highways. Using a cost-effectiveness model currently recommended by AASHTO, guidelines for safety-treating culverts have been developed for 36 in. diameter pipe, 4 ft x 6 ft (4 ft height x 6 ft width) single box, and 4 ft x 6 ft multi-box (double box) culverts located on low volume, rural highways (average daily traffic less than 20,000). Each culvert design was evaluated on fill section embankments with 2 1/2:1 and 6:1 slopes and for end offsets of 12, 18, and 24 ft. The treatments considered for each culvert design and embankment slope were: (1) do nothing (i.e., leave the culvert unprotected); (2) extend the culvert end 30 ft from the edge of the traveled way; (3) provide guardrail protection; and (4) provide grate protection.

  • Supplemental Notes:
    • Sponsored in part by Texas State Dept. of Highways and Public Transportation, Austin. Transportation Planning Div. Report on Economics of Highway Design Alternatives.
  • Corporate Authors:

    Texas Transportation Institute

    Texas A&M University System, 1600 E Lamar Boulevard
    Arlington, TX  United States  76011

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590

    Texas Office of Traffic Safety Administration

    P.O. Box 13166, Capitol Station
    Austin, TX  United States  78711
  • Authors:
    • Kohutek, T L
    • Ross, HEJ
  • Publication Date: 1978-3

Media Info

  • Pagination: 127 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00181961
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: FHWA-TX-77-225-1 Final Rpt., TTI-2-8-77-225-1
  • Created Date: Nov 14 1979 12:00AM