Citation

Sleath L, Wanty D. Proc. Int. Tech. Conf. Enhanced Safety Vehicles 1992; 1992: 393-400.

Copyright

(Copyright © 1992, In public domain, Publisher National Highway Traffic Safety Administration)

DOI

unavailable

PMID

unavailable

Abstract

This article describes the New Zealand policy for installing and assessing weight monitoring devices in flexible pavement. To date six different systems have been assessed at ten different sites. The systems include: a) bending plates containing strain gauges internally wired as a bridge; b) three different brands of piezo electric cables set in epoxy; c) capacitance strips set in epoxy; and d) strain gauge transducers fixed on culverts. Each site was fully investigated to ascertain its suitability. A full picture of the pavement was obtained from visual inspection, records, and excavation. Testing by Benkelman Beam was also carried out to establish uniformity and to ascertain pavement flexibility. Brief details of each type of weighing apparatus are provided as are data about problems encountered, and measurements obtained from the bending plate weigh-in-motion sensors. Data from these are collected in two forms: a) hourly statistics of cars and light commercial vehicles with and without trailers, and heavy vehicles in two categories based on length. Speed statistics are given for all types of vehicle and gross lead and axle group are provided for heavy commercial vehicles; and b) individual vehicle records for heavy goods vehicles consisting of: date and time vehicle passed over site; site and lane number; vehicle type code; gross weight and individual axle weights; total length and inter axle distances; and speed. Brief details of the methods of data processing are also provided.