Servizio Comunitario di Informazione in materia di Ricerca e Sviluppo - CORDIS

Urban traffic management

As congestion on the roads increases, PETRI (Parallel Environment for a real-time Traffic management and Information system) makes traffic control safer and more efficient. This cost-effective, high performance computing technology provides traffic controllers with a tool to monitor traffic, simulate various traffic control options and implement changes. Messages can be sent out using the available communications media, ensuring that the public is kept informed about current and predicted road conditions. Through parallel processing the PETRI system is able to provide real-time control of traffic networks. On-line traffic forecasting is also now possible. Traffic management departments will be able to use this system to improve traffic conditions in urban areas.

Parallel processing is used to achieve better results in less time. The PETRI system consists of software that runs on a symmetric multiprocessor platform. The software comprises three modules that have been integrated and parallelized. The demand prediction module uses a neural network parallel algorithm; the flow distribution module uses a master-slave approach; and the detailed simulation module uses clustering and colouring techniques to minimize synchronization. A graphical interface helps the operator visualize and control the urban network and an output system sends current and predicted traffic information to the public through several media including radio, personal computers and variable message signs (VMS). The municipality of Barcelona has been testing a prototype of the PETRI system to manage traffic on the city's ring road, a 43 km motorway containing about 20% of Barcelona's urban network.

Reported by

Universitat Politecnica de Cataluyna
08028 Barcelona