Results obtained from a nationwide survey and analysis of the performance of 18 heavily trafficked flexible pavements are presented. The pavements surveyed are located in nine states, and interviews were held with highway engineers at each location. Results show that the major types of distress requiring maintenance for heavily trafficked flexible pavements are fatigue or alligator cracking, transverse crakcing, longitudinal cracking, and rutting. The major causes are heavy traffic loadings, inadequate pavement structures, low temperature shrinkage of asphalt concrete, poor lane joint construction, aging of asphalt cement, and disintegration of cement-treated bases from deicing slats and freeze and thaw. The maintenance-free life of conventional flexible pavement depends on several factors including environmental region. For wet regions having significant freeze-thaw cycles, maintenance-free life ranges up to 10 years; for dry freeze-thaw regins, maintenance-free life ranges up to 15 years. In non-freeze-thaw wet or dry regions, maintenance-free life ranges up to 15 years. Several design recommendations are given that were found to improve the maintenance-free life of flexible pavements and whose use may be justified after the high maintenance and user delay costs of heavily trafficked highways are noted. /Author/

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 9-16
  • Monograph Title: Pavement design, evaluation and performance
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00155995
  • Record Type: Publication
  • ISBN: 0309220710
  • Files: TRIS, TRB
  • Created Date: Aug 15 1977 12:00AM