Update to AASHTO M 180-18 and Associated Highway Guardrail Specifications

Many states use AASHTO and ASTM standard specifications for their guardrail components. Changes to the state of practice and to guardrail materials have created a need to revise AASHTO Standard Specification M 180-18, Corrugated Sheet Steel Beams for Highway Guardrail, and its associated material standards, including those referenced in M 180-18. A lack of consistent standards can increase fabrication costs for hardware suppliers and ultimately transportation agencies. A manufacturer can spend a significant amount of resources matching one state’s standards only to start completely over to match another state’s standards. Consistency of specifications will also help to increase competition, allowing for the possibility of lower hardware costs for transportation agencies. The objectives of this research are to (a) perform a comprehensive review of AASHTO M 180-18 and its associated AASHTO and ASTM standards and (b) propose needed revisions to bring the specifications into conformance with current requirements and the state of practice for highway guardrail systems. The revised standard shall specify—or make reference to standards for—materials for components of the highway guardrail system, including beams, posts, end terminals, connecting hardware, etc. The proposed revisions and supporting commentary shall be provided to Technical Subcommittee 4d of the AASHTO Committee on Materials and Pavements (COMP TS 4d) and the AASHTO Technical Committee for Roadside Safety (TCRS) for review and possible adoption.  


  • English


  • Status: Active
  • Funding: $300000
  • Contract Numbers:

    Project 22-40

  • 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:

    McKenney, Christopher

  • Performing Organizations:

    Roadsafe LLC

  • Principal Investigators:

    Plaxico, Chuck

  • Start Date: 20190701
  • Expected Completion Date: 20210701
  • Actual Completion Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 01672564
  • Record Type: Research project
  • Source Agency: Transportation Research Board
  • Contract Numbers: Project 22-40
  • Files: TRB, RIP
  • Created Date: Jun 19 2018 12:46PM