On the Stabilizing Effect of Implementing Weight Stations on Truck Equivalency Factors for Pavement Design

In Costa Rica, weight stations for trucks and commercial vehicles were reinstated into service in 2008. Since the implementation of this control for freight vehicles, a stabilizing trend in the percentage of heavy vehicles with excess loading was observed. For pavement design purposes, this resulted in the stabilization of the truck equivalency factors. These findings were statistically validated by processing all the weight data collected at different stations located in the national road network between 2008 and 2011. By running linear regressions, we obtain results that indicate that given a constant percentage of noncompliance, the truck equivalency factor for C2, C3, and T3-S2 vehicles tend to the stabilized values ??of 0.20, 0.66, 1.19, respectively. These results concur with additional power regressions performed on the data. Furthermore, extra weighing enforcements for the T3-S3 vehicle’s tandem axle could result in a 0.17 decrease on the truck equivalency factor. In future research, disaggregated data trends will be analyzed along with temporal variations. Results herein should also benefit countries that have yet to implement weighing stations.


  • English

Media Info

  • Media Type: Web
  • Features: Figures; References; Tables;
  • Pagination: 17p

Subject/Index Terms

Filing Info

  • Accession Number: 01763596
  • Record Type: Publication
  • Report/Paper Numbers: TRBAM-21-02739
  • Files: TRIS, TRB, ATRI
  • Created Date: Dec 23 2020 11:06AM