Mitsubishi Heavy Industries Technical Review
    Vol. 50 No. 4 (2013)   Technologies that Underlie Urban Transportation Systems
    Technical Papers

    System Evaluation Test of Global Navigation Satellite System-based Road Pricing System


    An autonomous road pricing system charges according to the charging points that the car has passed and the travel distance, based on location information provided by the Global Navigation Satellite System (GNSS). It is expected that this system will solve problems related to automobile traffic through the reduction of economic loss due to traffic congestion, the lowering of environmental burden, the recovery of road maintenance costs, etc. In order to bring an autonomous road pricing system into practical use, it is necessary to obtain the trust of stakeholders including drivers. This is achieved by demonstrating that the system can levy charges consistently and stably regardless of the travelling patterns or positioning errors that may be magnified depending on the environment. Mitsubishi Heavy Industries, Ltd. (MHI) has been enhancing the reliability of charging functionality through the improvement of positioning accuracy with use of the dead reckoning and map matching methods. Furthermore, MHI has recently improved the reliability of the system from the driver's perspective by eliminating inconsistencies in the position/timing of indicating and informing the driver of the charge. The developed system has been field tested widely on public roads (expressways, general roads, in urban and rural areas, etc.) in Singapore where MHI aims to put this system into practical use, and has confirmed that its reliability and accuracy are sufficient therefore.