PEDOLOGICAL SOIL-HIGHWAY DISTRESS STUDY, BROOKINGS COUNTY, SOUTH DAKOTA

THE STUDY WAS CONDUCTED TO DETERMINE IF ANY USEFUL RELATIONSHIP COULD BE FOUND BETWEEN HIGHWAY PERFORMANCE AND THE PEDOLOGICAL SOILS OVER WHICH THE HIGHWAYS WERE BUILT. IN HAND COUNTY, FLEXIBLE PAVEMENT THICKNESS APPEARED TO BE RELATED TO THE DRAINAGE INDEX (NATURAL SLOPE AND PERMEABILITY) OF THE SOIL. CONCLUSIONS FROM THE BROOKINGS COUNTY STUDY ARE AS FOLLOWS: (1) A GENERAL RELATIONSHIP IS FOUND TO EXIST BETWEEN THE THICKNESS OF PAVEMENTS ORIGINALLY UNDERDESIGNED AND THEN BROUGHT TO SATISFACTORY PERFORMANCE BY MAINTENANCE AND THE DRAINAGE INDEXES OF THE UNDERLYING SOILS, (2) THE RELATIONSHIP BETWEEN HIGHWAY PERFORMANCE AND SOILS PERMITS A DESIGN METHOD TO BE DEVELOPED WHICH IS BASED UPON DRAINAGE INDEX. THIS DESIGN CONSIDERS SOIL AND MOISTURE RELATIONSHIPS WHICH ARE NOT NORMALLY INCLUDED IN OTHER DESIGN METHODS. DETAILED SAMPLING AND LABORATORY TESTING OF SOILS COULD ALSO BE VIRTUALLY ELIMINATED, (3) EVALUATION OF NEWER ROADS DESIGNED BY PRESENT METHODS INDICATES INSTANCES OF OVERDESIGN RESULTING IN THE WASTE OF MATERIAL AND MONEY, AND (4) THERE IS NO SUITABLE MEANS FOR EVALUATING ACCURATELY THE CONDITION OF SMALL SECTIONS OF HIGHWAY. PRESENTLY USED METHODS ARE TOO GREATLY INFLUENCED BY SURFACE TEXTURE OR ARE NOT APPLICABLE TO A STUDY OF THIS NATURE. FOR THIS REASON SURFACE CONDITION WAS NOT CONSIDERED IN THIS REPORT ALTHOUGH THERE IS LITTLE DOUBT THAT IT SHOULD BE CONSIDERED AN IMPORTANT FACTOR IN DETERMINING HIGHWAY PERFORMANCE. /BPR/

  • Supplemental Notes:
    • Hpr, Bpr-619/64/
  • Corporate Authors:

    South Dakota Department of Transportation

    700 East Broadway Avenue
    Pierre, SD  United States  57501

    Bureau of Public Roads /US

    400 7th Street, SW
    Washington, DC  United States  20590
  • Authors:
    • Crawford, R A
    • Anderson, D W
  • Publication Date: 1967

Subject/Index Terms

Filing Info

  • Accession Number: 00206326
  • Record Type: Publication
  • Source Agency: Bureau of Public Roads /US
  • Files: TRIS, STATEDOT
  • Created Date: Apr 12 1994 12:00AM