PRESENT SERVICEABILITY INDEX - SOUTH DAKOTA STUDY

IN ORDER TO DEVELOP PRESENT SERVICEABILITY INDEX (PSI) EQUATIONS FOR USE ON CONCRETE PAVEMENTS, FLEXIBLE PAVEMENTS, SURFACE TREATMENTS AND CHIP SEAL COATED FLEXIBLE PAVEMENTS USING THE SOUTH DAKOTA BPR ROUGHOMETER AND TO COMPARE THE RESULTS WITH THE SOUTH DAKOTA SUFFICIENCY RATINGS, APPROXIMATELY 6,000 MILES OF THE STATE RURAL TRUNK SYSTEM WERE TESTED OVER A PERIOD OF THREE YEARS. MEASUREMENTS INCLUDED ROUGHNESS, CRACKING AND PATCHING, RUT DEPTH AND TEXTURE. AS A RESULT OF THIS STUDY, THE AUTHORS CONCLUDE THAT THE METHODS OF MEASUREMENT SELECTED DO NOT ACCURATELY REFLECT VARIATIONS IN RIDING CHARACTERISTICS OF THE PAVEMENTS NOR DO THEY RELIABLY PREDICT THE OPINIONS OF SOUTH DAKOTA HIGHWAY USERS. THEY ALSO CONCLUDE THAT THE PRESENT BPR TYPE ROUGHOMETER FAILS TO DISTINGUISH BETWEEN SURFACE TEXTURE AND ACTUAL ROUGHNESS AND FAILS TO DETECT SOME SERIOUS HIGHWAY ROUGHNESS. THE PSI VALUES OBTAINED AS THE RESULT OF THIS STUDY DO NOT CORRELATE WELL WITH THE SUFFICIENCY RATINGS. THE AUTHORS RECOMMEND THAT SOUTH DAKOTA CONTINUE USING THE SUFFICIENCY RATING SYSTEM UNTIL IMPROVED METHODS OF MEASURING PAVEMENT ROUGHNESS BE DEVELOPED. /BPR/

  • Supplemental Notes:
    • Hpr-1/2/, STATE-607 (63)
  • Corporate Authors:

    South Dakota Department of Transportation

    700 East Broadway Avenue
    Pierre, SD  USA  57501

    Bureau of Public Roads /US

    400 7th Street, SW
    Washington, DC  USA  20590
  • Authors:
    • Crawford, R A
    • Woods, T M
  • Publication Date: 1967

Subject/Index Terms

Filing Info

  • Accession Number: 00206330
  • Record Type: Publication
  • Source Agency: Bureau of Public Roads /US
  • Files: TRIS, STATEDOT
  • Created Date: Jun 24 1994 12:00AM