Using GPS probe vehicle data for traffic network and system optimisation.

GPS probe vehicle and floating car data has been used internationally to gather data on the movements of vehicles and the performance of the road network, including linking into real-time traffic information. This paper examines the next step in this process: using the collected data to feed back into traffic system optimisation, initially through off-line processing but ultimately in real-time. A trial has been conducted in Melbourne to use data collected from a limited number of GPS probe vehicle runs to improve the setting of traffic signal offsets for linking along a major arterial route. The collected data provided an insight into the operation of the route but was insufficient to allow the intended feedback process to occur. The trial demonstrates that while potential exists for the use of GPS probe vehicle data for traffic network performance monitoring and optimisation, it is not a simple task. (a) For the covering entry of this conference, please see ITRD abstract no. E211903.