Development of Modified TXDOT Single-Post Skid-Mounted Sign Support

Previous crash testing determined that the conventional Texas Department of Transportation (TxDOT) single-post skid-mounted sign support did not satisfy guidelines included in the American Association of State Highway and Transportation Officials Manual for Assessing Safety Hardware (MASH). Modifications were made to the system to improve impact performance and meet MASH requirements. The modifications included increasing mounting height of the sign, installing weakening holes in the wood support post at a prescribed height, and adding a wire rope loop around the weakening holes to act as a hinge mechanism when sections of the wood sign support fracture during vehicle impact. Crash tests were performed on the modified TxDOT single-post skid-mounted sign support system in accordance with the MASH Test Level 3 (TL-3) matrix for work-zone traffic control devices. This report provides details of the modified TxDOT single-post skid-mounted sign support, the crash tests and results, and the performance assessment of the modified TxDOT single-post skid-mounted sign support for MASH TL-3 work-zone traffic control device evaluation criteria. The modified TxDOT single-post skid-mounted sign support with 90-inch sign mounting height, weakening holes, and tether cable met the performance criteria for MASH TL-3 work-zone traffic control devices.

• Record URL:
  https://static.tti.tamu.edu/tti.tamu.edu/documents/0-6968-R3.pdf
• 
• Record URL:
  https://rosap.ntl.bts.gov/view/dot/60222
• Corporate Authors:

  Texas A&M Transportation Institute

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

  Texas Department of Transportation

  Research and Technology Implementation Office
  125 E 11th Street
  Austin, TX  United States  78701-2483

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Bligh, Roger P
  • Schulz, Nathan D
  • Menges, Wanda L
  • Schroeder, William
  • Kuhn, Darrell L
• Publication Date: 2021-6

Language

• English

Media Info

• Media Type: Digital/other
• Features: Appendices; Figures; Photos; References; Tables;
• Pagination: 146p

Subject/Index Terms

• TRT Terms: Crash tests; Sign supports; Work zone traffic control
• Identifier Terms: AASHTO Manual for Assessing Safety Hardware; Texas Department of Transportation
• Subject Areas: Design; Highways; Safety and Human Factors;

Filing Info

• Accession Number: 01781903
• Record Type: Publication
• Report/Paper Numbers: FHWA/TX-21/0-6968-R3, 0-6968-R3
• Contract Numbers: 0-6968
• Files: NTL, TRIS, ATRI, USDOT, STATEDOT
• Created Date: Sep 20 2021 2:52PM