Traffic systems are characterized by resource sharing and conflicts, which require synchronization issues to be carefully addressed, so a proper model of the traffic behavior is of paramount importance, for instance, to suitably schedule the traffic lights, as in the case under concern. A variety of models, methods, and architectures have been proposed for controlling urban traffic via signalized intersections, with the aim of optimizing the transportation network performances. A class of hybrid Petri nets is shown to provide a valuable model of urban networks of signalized intersections. In fact, such networks can be fruitfully considered to be hybrid systems, where the vehicle flow behavior is represented by means of a time-driven model, and the traffic light dynamics is represented by an event-driven model. The proposed model has been validated using real-traffic data about the Italian city of Turin. Some relevant experimental results are reported and discussed. Finally, some possible control-oriented applications of the model are described.
On modelling urban transportation networks via hybrid Petri nets
Modellbildung von städtischen Verkehrssystemen mittels Petri Netzen
Control Engineering Practice ; 12 , 10 ; 1235-1239
2004
5 Seiten, 13 Bilder, 5 Tabellen, 25 Quellen
Aufsatz (Zeitschrift)
Englisch
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