SOME RECENT DEVELOPMENTS IN WORK ON SKIDDING PROBLEMS AT THE ROAD RESEARCH LABORATORY

THE LATEST TESTING TECHNIQUES AND FACILITIES FOR WORK WHICH HAVE BEEN DEVELOPED AT THE ROAD RESEARCH LABORATORY ON SKIDDING PROBLEMS ARE REPORTED AND THE FOLLOWING CONCLUSION DRAWN' /1/ ROUGH COARSE-TEXTURED SURFACES ARE LIKELY TO GIVE BETTER VALUES OF SKIDDING RESISTANCE AT HIGH SPEEDS UNDER WET CONDITIONS THAN ARE SURFACES OF THE SMOOTH OR FINE-TEXTURED TYPE, /2/ AT HIGHER SPEEDS, EFFECTS DUE TO INERTIA OF THE WATER ON A WET ROAD BECOMES INCREASINGLY IMPORTANT AND THIS POINT IS LIKELY TO ASSUME INCREASING IMPORTANCE IN SKID-TESTING WHEN HIGHER TESTING SPEEDS ARE ATTEMPTED. /3/ RESULTS OBTAINED WITH THE HEAVY WHEEL LOAD MACHINE SHOW THAT ON A NUMBER OF SURFACES INCREASES IN WHEEL LOAD AND INFLATION PRESSURE LEAD TO REDUCTIONS IN THE VALUES OF COEFFICIENT OBTAINED, /4/ PREVIOUS FINDINGS ON THE IMPORTANCE OF TIRE TREAD PATTERN, THE RESILIENCE PROPERTIES OF THE TREAD RUBBERS AND THE IMPORTANCE OF THEIR INTERACTION WITH THE TEXTURE OF THE ROAD SURFACE ARE CONFIRMED OVER A WIDE RANGE OF CONDITIONS, AND /5/ WHEN WHEELS ARE BRAKED ON A WET SURFACE THE RATE OF SLIP HAS A VERY IMPORTANT INFLUENCE ON THE VALUE OF COEFFICIENT WHICH IS OBTAINED.

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 43-59
  • Monograph Title: Pavement design and evaluation 1963
  • Serial:

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Filing Info

  • Accession Number: 00206220
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Oct 20 1994 12:00AM