INSTRUMENTATION AND PHOTOGRAPHIC TECHNIQUES FOR DETERMINING THE DISPLACEMENT, VELOCITY CHANGE, AND DECELERATION OF VEHICLES WITH BREAKAWAY SIGN STRUCTURES

A SERIES OF SIX FULL-SCALE CRASH TESTS EMPLOYING AN AUTOMOBILE TOWED INTO A COLLISION WITH ONE SUPPORT OF A TWO SUPPORT HIGHWAY ROADSIDE SIGN WAS CONDUCTED. THE SERIES CONSIDERED IN THIS REPORT WAS CONDUCTED FOR THE PURPOSE OF REFINING ELECTRONIC AND PHOTOGRAPHIC INSTRUMENTATION TECHNIQUES. FIXED BASE SIGN SUPPORTS WERE STRUCK IN TWO OF THE SIX TESTS, AND BREAK-AWAY BASE SIGN SUPPORTS WERE STRUCK IN THE REMAINING FOUR TESTS. HIGHWAY-SPEED MOTION PICTURE FILMS WERE MADE OF EACH OF THE CRASH TESTS. THESE FILMS PROVIDED A DISPLACEMENT-TIME RECORD OF EACH COLLISION. A PIEZOELECTRIC ACCELEROMETER WAS INSTALLED ON THE FRAME OF EACH VEHICLE. THE SIGNAL FROM THIS ACCELEROMETER WAS TRANSMITTED TO A RECORDING OSCILLOGRAPH, AND A TRACE OF THE ACCELEROMETER BEHAVIOR WAS RECORDED ON LIGHT SENSITIVE PAPER. THIS TRACE PROVIDED AN ACCELERATION-TIME RECORD OF EACH COLLISION. OTHER ELECTRONIC INSTRUMENTATION WAS INSTALLED IN ORDER TO PROVIDE STRAIN-TIME INFORMATION ABOUT THE COLLISION. EXAMINATION AND COMPARISON OF INFORMATION FROM EACH OF THE RECORDS OBTAINED FROM THE FINAL TWO TESTS HAS LED TO A TIME DEPENDENT DESCRIPTION, OR CHRONOLOGY OF COLLISION. THIS DESCRIPTION OF THE COLLISION INCIDENT AND DEFINITION OF CRITICAL EVENTS IN THE HISTORY OF THE COLLISION PROVIDES AN ORIGINAL DESCRIPTION OF THE BEHAVIOR OF BREAK-AWAY SIGN SUPPORTS. /AUTHOR/

  • Supplemental Notes:
    • Research RePORT 68-3,117 PP
  • Corporate Authors:

    Texas A&M University, College Station

    College Station, TX  USA  77840

    Texas Transportation Institute

    Texas A&M University System, 1600 E Lamar Boulevard
    Arlington, TX  USA  76011
  • Authors:
    • Olson, R M
  • Publication Date: 1966-9

Subject/Index Terms

Filing Info

  • Accession Number: 00202597
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 9 1994 12:00AM