Three temporary construction zone traffic barriers were crash-tested to determine their performance. A 12-in. timber curb, with steel splice plates connecting adjoining sections and steel pins driven into a gravel subbase, was unable to redirect vehicles in very minor impacts. The test vehicle straddled the barrier at 30 mph 3 deg and 20 mph 7.5 deg and went completely over it at 30 mph 7.5 deg. Only minor movement of the barrier was detected. A 16-in. high timber curb, with a corrugated-beam steel rail bolted to the face (W-beam timber curb), was successfully tested at 43 mph 17 deg and 38 mph 14 deg. Steel retaining washers welded to the tops of the anchor pins reduced barrier movement upon impact. This barrier is suitable for use in construction zones where moderate impacts may occur (40 mph 15 deg), and requires only a few inches of clear deflection distance behind the barrier. New York's standard protable precast-concrete median barrier using pin-connected joints contained an impacting vehicle at 55 mph 25 deg, and appears suitable for highspeed work zones with no connection to the pavement or other barrier restraint except for the two terminal sections. Pulling the joints tight upon installation and filling the bottom corners with mortar substantially reduced barrier deflection and damage. Barrier deflection up to 15 in. may result in 60 mph 25 deg impacts where anchorage to the pavement is not provided but would be less where conditions do not permit such severe impacts. (FHWA)

  • Supplemental Notes:
    • Study Title: "Improvement of Safety Facility Accessories".
  • Corporate Authors:

    New York State Department of Transportation

    Engineering Research and Development Bureau, 1220 Washington Avenue
    Albany, NY  United States  12232

    Federal Highway Administration

    Office of Research, 1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Hahn, K C
    • Bryden, J E
  • Publication Date: 1980-6

Media Info

  • Pagination: 54 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00319774
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: FHWA/NY/RR-80/82 Intrm Rpt., FCP 41G1-244
  • Created Date: Mar 12 1981 12:00AM