There is increased interest in the concept of Virtual Weigh Stations (VWS), an extension of the Weigh In Motion (WIM) data collection site allowing image capture. A VWS system incorporates high-performance WIM equipment combined with video monitoring. Side vehicle image capture systems and licence plate reading cameras are integrated with the WIM system. Over-height and over-width detection systems can be added. The collected data is automatically analysed for verification of compliance with local size and weight regulations. The VWS can be used to monitor commercial traffic in areas where it was previously not possible due to cost or physical reasons. Further work is required on handling the large size and reporting of the image data. Successful programmes have gained the support of the local transportation department, police and local people. The camera systems and associated hardware support systems are high-value items and are at risk of vandalism or theft. Care must be taken to protect the systems.
Abstract