This project has involved the collection into a single database of all available WIM data and the interrogation of that database to provide information on speed and mass compliance by two selected vehicle types. Results of this work must be treated with caution. WIM sites, and these may not be representative of the full road network and the accuracy of WIM devices, particularly for the measurement of mass, depends on regular calibration. Due to these limitations of the data, only highly aggregated results have been reported. One of the purposes of the project has been to enable experience to be gained in the use of the available data. In the future, it may be possible to utilise the data to undertake more precise investigations of road behaviour by heavy vehicles, for example by route, by region or by road type. This may assist in an understanding of the compliance behaviour of different segments of the road transport industry, and assist in the development of approaches by regulators and the road transport industry to improve levels of compliance. (Author/publisher)
Abstract