This paper is the second of two papers related to Weigh-in-Motion (WIM) data in Queensland. The first highlights the types and causes of WIM data variability. This paper develops a methodology which will remove the influence of the variability. Mass, spacing and speed parameters as recorded by a WIM device can be adjusted independently using the methodology. It is expected that as a result of the adjustment procedure WIM data will be brought into conformity with either the ASTM C1318 or the COST 323 specification. The aim of the research was to develop a methodology which: 1. could identify suspect data; 2. could process all 50 million WIM data records stored in Queensland; 3. would not be dependent on a specific WIM technology; 4. improve the accuracy of the data, and 5. could be cost-effectively implemented. The process uses data from standard semi-trailers (Austroads Class 9 or 123 vehicles) to determine adjustment parameters for single, tandem and tri-axial groups and these adjustment parameters are then applied to the single, tandem and tri-axial groups of all vehicle classes. Since the adjustment is carried out on each individual axle group for each data record the adjustment procedure maintains the fidelity of the data. (a) For the covering entry of this conference, please see ITRD abstract no. 0612AR242E.
Samenvatting