CRASH TEST OF MILE POST MARKER

THIS REPORT DESCRIBES A VEHICLE CRASH TEST ON A MILE POST MARKER. THE VEHICLE WAS A SEDAN WEIGHTING 3400 LBS. AND WAS TOWED INTO THE MILE POST MARKER AT 43.9 MPH. THE MILE POST MARKER, PROPOSED FOR USE ON INTERSTATE HIGHWAYS, CONSISTED OF A 1 FT. BY 4 FT. SIGN PANEL MOUNTED ON A 2 IN. STANDARD PIPE 8 FT. HIGH WITH A THREADED COUPLING AS A BREAKAWAY FEATURE. THE STANDARD THREADED COUPLING BREAKAWAY FEATURE RESULTED IN ONLY 1.6 MPH CHANGE IN VEHICLE VELOCITY DURING IMPACT. HOWEVER, THE BEHAVIOR OF THE SIGN PANEL AND POST, WHICH STRUCK THE WINDSHIELD WAS ESTIMATED TO HAVE BEEN ABOUT 3 IN. AND WAS REDUCED BY THE SIGN'S CONTACT WITH THE VEHICLE'S COWLING, WINDSHIELD, WIPER ASSEMBLY AND TOP OF DASH. MODIFICATIONS TO THE PROPOSED MILE POST MARKER ARE INDICATED IN ORDER TO MINIMIZE THE PROBABILITY OF A SECONDARY IMPACT INTO THE WINDSHIELD AND INTERIOR OF THE PASSENGER COMPARTMENT.

• Supplemental Notes:
  • RES STUDY 2-8-68-146
• Corporate Authors:

  Texas Transportation Institute

  Texas A&M University System, 1600 E Lamar Boulevard
  Arlington, TX  United States  76011
• Authors:
  • Hirsch, T J
  • Buth, E
• Publication Date: 1972-1

Media Info

• Features: Figures; Tables;
• Pagination: 15 p.

Subject/Index Terms

• TRT Terms: Breakaway supports; Crash injury research; Crash tests; Crashes; Highway safety; Research; Shock resistance; Sign supports; Signs; Testing
• Uncontrolled Terms: Impact strength
• Old TRIS Terms: Sign structures
• Subject Areas: Highways; Research; Safety and Human Factors;

Filing Info

• Accession Number: 00219779
• Record Type: Publication
• Source Agency: Texas State Department of Highways & Public Transp
• Report/Paper Numbers: Interim
• Files: TRIS, STATEDOT
• Created Date: Apr 20 1974 12:00AM