WEIGHING OF TRUCKS IN MOTION: CALIBRATION OF EQUIPMENT AND CORRECTION OF MEASUREMENTS

Weighing-in-motion (WIM) of trucks is a relatively inexpensive technique for measuring truck axle loads. Unfortunately, WIM measurements are subject to systematic and random errors. A method has been developed to suppress the influence of these errors: during periodic calibration sessions on a WIM site, a random sample of trucks is taken from the traffic stream. Each truck axle is weighed twice: once by the WIM equipment, then on an accurate (static) scale. By comparing the above pairs of axle loads, the magnitude of the systematic and random errors of the WIM equipment used on the site can be established. With this knowledge a large portion of the errors can be eliminated, and inaccurate WIM measurements, done in periods between two calibrations, rectified. Three computer tools have been developed to assist with the calibration, mass data processing, and with the graphical representation of results. (A) For the covering abstract see ITRD E105786.

Language

  • English

Media Info

  • Features: References;
  • Pagination: p. 68-82

Subject/Index Terms

Filing Info

  • Accession Number: 00797956
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 0-620-22375-8
  • Files: ITRD
  • Created Date: Sep 8 2000 12:00AM