TRAFFIC LOAD SPECTRA DEVELOPMENT FOR THE 2002 AASHTO DESIGN GUIDE

Accurate knowledge of traffic volumes and loading is essential to structural pavement design and performance. Underestimation of design traffic can result in premature pavement failures and excessive rehabilitation costs. Overestimation can result in overly conservative pavement designs that are not cost effective for the owner agency. Traffic input for the anticipated National Cooperative Highway Research Program (NCHRP) 1-37A Design Guide will be in terms of axle load spectra along with several other important traffic parameters. Axle load spectra consist of classifying traffic loading in terms of the number of load applications of various axle configurations (single, dual, and tridem) within a given weight classification range. Long term pavement performance (LTPP) data from Mississippi sites were extensively reviewed to determine vehicle class distribution, monthly and hourly distribution factors, and axle load spectra. These data will serve as baseline data for Mississippi Department of Transportation implementation of the new mechanistic-empirical structural pavement design guide.

Language

  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 100 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00987795
  • Record Type: Publication
  • Report/Paper Numbers: FHWA/MS-DOT-RD-04-165,, Final Report
  • Files: NTL, TRIS, USDOT, STATEDOT
  • Created Date: Mar 31 2005 12:00AM