TRUCK TESTS ON TEXAS CONCRETE MEDIAN BARRIER

THE RIGID TEXAS CONCRETE MEDIAN BARRIER (CMB-70), WITH INCLINED SURFACES, REMAINED INTACT IN RESTRAINING AND REDIRECTING A LARGE 48,800 LB. TRACTOR-TRAILER TRUCK WITH LOAD UNDER THE FULL-SCALE IMPACT TEST CONDITIONS OF 35 MPH/19 DEG; 34 MPH/16 DEG; AND 45 MPH/15 DEG. THE TRUCK WAS REMOTELY CONTROLLED FROM A CHASE PICKUP VEHICLE. THE LONGITUDINALLY REINFORCED CMB HAD A HEIGHT OF 32 IN. AND WEIGHED 507 PLF. THE BARRIER TEST SECTION, WITH A LENGTH OF 150 FT., WAS NOT ANCHORED TO THE GROUND. A 1-IN. LAYER OF HOT MIX ASPHALT WAS PLACED AT THE BASE OF THE BARRIER TO HELP RESIST LATERAL DISPLACEMENTS. SUBSEQUENT TO THE TESTS, NO ROTATIONAL AND LATERAL PERMANENT SET DISPLACEMENTS OF THE BARRIER WAS VISIBLE. THE RELATIVELY MINOR DAMAGE TO THE TRUCK CONSISTED OF SHEET METAL DAMAGE TO THE FRONT FENDER AND RUNNING BOARD OF THE TRACTOR. ESTIMATED RAPAIR COST WOULD BE LESS THAN 200 DOLLARS. MAINTENANCE OF THE BARRIER WOULD REQUIRE AT MOST A LIGHT SAND-BLASTING JOB TO REMOVE THE UNSIGHTLY TIRE SCRUB MARKINGS. THE SMALL AMOUNT OF CONCRETE SPALLING THAT OCCURRED IN THE IMMEDIATE AREA OF IMPACT WOULD REQUIRE NO MAINTENANCE. THE FENCE AND LUMINAIRE POLE ON TOP OF THE BARRIER WERE NOT DAMAGED. /AUTHOR/

  • Corporate Authors:

    Texas Transportation Institute

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

    Texas State Department of Highways & Public Transp

    11th and Brazos Streets
    Austin, TX  USA  78701

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  USA  20590
  • Authors:
    • Hirsch, T J
    • Post, E R
  • Publication Date: 1972-12

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 43 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00203809
  • Record Type: Publication
  • Report/Paper Numbers: No 146-7 Res Rept
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Aug 5 1973 12:00AM