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EFFECTIVENESS OF STUDDED TIRES

THE RESULTS OF TESTS OF THE LOCKED WHEEL STOPPING DISTANCES OF FOUR TIRE COMBINATIONS ON GLARE ICE, WET AND DRY ASPHALTIC CONCRETE, AND WET AND DRY PORTLAND CEMENT CONCRETE PAVEMENTS ARE DESCRIBED. IDENTICAL CARS WITH HIGHWAY TREAD TIRES ON FOUR WHEELS WITH PLAIN SNOW TIRES ON THE REAR WHEELS, WITH STUDDED SNOW TIRES ON THE REAR WHEELS, AND WITH STUDDED SNOW TIRES ON FOUR WHEELS WERE TESTED AT SPEEDS UP TO 50 M.P.H. AND AT TEMPERATURES FROM MINUS 5F, TO 33F. ON GLARE ICE, SNOW TIRES GAVE NO CONSISTENT IMPROVEMENT IN STOPPING DISTANCE, COMPARED TO STANDARD HIGHWAY TIRES. STUDDED TIRES ON THE REAR WHEELS RESULTED IN A SIGNIFICANT REDUCTION IN STOPPING DISTANCE, AND STUDDED TIRES ON ALL FOUR WHEELS RESULTED IN A REDUCTION IN STOPPING DISTANCE WHICH WAS MORE THAN TWICE THE REDUCTION WITH STUDS IN THE REAR TIRES ONLY. THE IMPROVEMENTS WERE GREATEST AT ICE TEMPERATURES NEAR THE FREEZING POINT. WHILE THEY DECREASED WITH DECREASING ICE TEMPERATURES, THESE IMPROVEMENTS DID NOT DISAPPEAR AT TEMPERATURES NEAR MINUS 5F, AS SUGGESTED BY EARLIER RESEARCH. ON ASPHALT PAVEMENTS, NO SIGNIFICANT DIFFERENCES IN STOPPING DISTANCES WERE FOUND, WITH EITHER WET OR DRY SURFACES. ON CONCRETE PAVEMENTS STUDDED TIRES WERE FOUND TO GIVE SMALL BUT SIGNIFICANT INCREASES IN STOPPING DISTANCES WITH BOTH WET AND DRY SURFACES. /AUTHOR/

  • Supplemental Notes:
    • 36 Pp, Tabs, FIGS, REFS
  • Corporate Authors:

    University of Waterloo

    Department of Civil Engineering, 200 University Avenue West
    Waterloo, Ontario  Canada  N2L 3G1
  • Authors:
    • Smith, R W
    • Ewens, W E
    • Clough, D J
  • Publication Date: 1970

Subject/Index Terms

Filing Info

  • Accession Number: 00217123
  • Record Type: Publication
  • Source Agency: Nat Safety Council Safety Res Info Serv
  • Files: TRIS
  • Created Date: Jul 18 1971 12:00AM