PROCEDURE FOR EVALUATING THE EFFECTS OF LEGAL LOAD LIMITS ON PAVEMENT COSTS

A computer program that evaluates the effect of changes in legal load limits on the life-cycle costs of flexible, rigid, and composite pavements is described. The methodology of the NULOAD program for determining the effects of changes in truck size, weight, and configuration on pavement performance is examined, and these effects are related to maintenance and rehabilitation and their related costs. A sample problem from NULOAD is also discussed. Fifty representative sections can be grouped by type of system (such as Interstate sections) to reflect the effect of traffic loadings on the different classes of highways. The procedure permits inclusion of a maximum of 10 different truck types along with various axle and tire configurations, such as single axles with single tires and tridem-axle, single-axle, and tandem-axle configurations. Truck axle weight and configuration are the major variables considered, but the procedure can also handle new sizes of trucks, such as the triple-trailer units. The procedure also includes a computerized shifting procedure for gross vehicle weight and axle-load distribution. (Author)

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 1-8
  • Monograph Title: Pavement systems: assessment of load effects, design, and bases
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00308538
  • Record Type: Publication
  • ISBN: 0309029759
  • Files: TRIS, TRB
  • Created Date: Apr 22 1980 12:00AM