BREAK-AWAY COMPONENTS PRODUCE SAFER ROADSIDE SIGNS

BEHAVIOR OF ROADSIDE SIGN SUPPORTS SUBJECTED TO COLLISIONS WAS DESCRIBED. SUPPORT SELECTION WAS PREDICATED ON TEXAS HIGHWAY DEPARTMENT DESIGN PROCEDURES AND ON DEVELOPMENT OF INTERIM CONCEPTS TO MINIMIZE HAZARDS. FULL-SCALE CRASH TESTS TO OBSERVE THE IMPACT BEHAVIOR OF SUPPORTS WITH NEW DEVICES RESULTED IN REVISED DESIGN DETAILS WHICH ARE NOW BEING USED. FOR TESTING, A CRASH VEHICLE WAS TOWED INTO A CONTROLLED COLLISION WITH A SIGN SUPPORT, AND THE COLLISION WAS RECORDED ON HIGH-SPEED PHOTOGRAPHIC FILM. THE FILM WAS STUDIED TO OBSERVE THE QUALITATIVE BEHAVIOR OF THE SIGN SUPPORT SUBJECTED TO A COLLISION BY AN AUTOMOBILE. DISPLACEMENT-TIME DATA WERE OBTAINED FROM THE HIGH-SPEED FILM, AND ACCELEROMETERS MOUNTED ON THE FRAME OF THE CRASH VEHICLE WERE USED TO PROVIDE A DECELERATION-TIME TRACE ON A RECORDING OSCILLOGRAPH. AN ELECTRONIC COMPUTER PROGRAM ALSO WAS DEVELOPED TO SIMULATE THE COLLISION INCIDENT. PHENOMENOLOGICAL TESTING WAS IMPORTANT IN THE TESTING PROCEDURE. IMPROVEMENTS IN CAMERA TECHNIQUE AND FILM DATA REDUCTION AUGMENTED AND EXTENDED THE PHENOMENOLOGICAL TESTING. THESE IMPROVEMENTS PRODUCED QUANTITATIVE ANALYTICAL DATA. THE MATHEMATICAL MODEL WAS A PRODUCT OF PHENOMENOLOGICAL AND QUANTATIVE TESTING.

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  • Supplemental Notes:
    • Paper sponsored by Committee on Guardrails, Median Barriers, and Sign, Signal, and Lighting Supports and presented at the 46th Annual Meeting Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
  • Authors:
    • Olson, Robert M
    • Rowan, Neilon J
    • Edwards, Thomas C
  • Publication Date: 1967

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 1-29
  • Monograph Title: Guardrails, barriers and sign supports
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00203236
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Sep 5 1994 12:00AM