EVALUATION OF PRESENT LEGISLATION AND REGULATIONS ON TIRE SIZES, CONFIGURATIONS AND LOAD LIMITS. FINAL REPORT

The report describes the techniques used to evaluate the effects of various axle configurations with dual and single types on pavement performance and current state of Washington Regulation RCW 46.44.042. Equivalent wheel load factors were developed for various widths of single tyres on rigid and flexible pavements. Single tyres with widths of 10-18 in were analysed and it was found that by equivalent axle loads the predicted damage to pavements was greater for axles with single tyres than those with dual tyres. In order to verify the theoretical analyses two field experiments were carried out. In the first, extensometers were placed in the outer wheelpath of the pavement ramp and truck-induced pavement surface deflections were measured after the vehicles were weighed. A comparison of measured and calculated deflections showed good agreement thus in part varifying the theoretically based calculations. In the second experiment, the verification process made use of the WSDOT falling weight deflectometer and again the theoretical approach was further verified. (TRRL)

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 195 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00390310
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Report/Paper Numbers: WA-RD 59.1 Monograph
  • Files: ITRD, TRIS, STATEDOT
  • Created Date: Nov 30 1984 12:00AM