Modeling and Optimization of Traffic Flow in Urban Areas - Czech ...

Modeling and Optimizationof Traffic Flow in Urban AreasIng. Michal KutilCzech Technical University in Prague, 2010Thesis Advisor: Doc. Dr. Ing. Zdeněk HanzálekThis thesis presents models of simple and general traffic intersections. Thesimple intersection model is based on the new queue model, where the statevariables represent the queue lengths and the mean waiting times in thequeues. The general traffic intersection model is based on a constant speedcontinuous Petri net. The continuous Petri net tool offers more flexibility ofmodeling general intersections and possibility interconnects them to the complexurban traffic region model in future. The Model is innovative, firstly, bythe free space modeling together with the opposite direction of the vehicularflow, secondly by the continuous Petri net use only leading to a smaller statespace. For this purpose, we show a new method for conflict resolution in acontinuous Petri net based on the maximal speed proportion. The control ofintersections is prosed firstly for simple intersection, where the waiting timesof the individual vehicles in the various streets of the intersection are takeninto account to some degree. Secondly for the urban traffic region model,where the scheduling is used to find an optimal control of light controlledintersections. The performance of all depicted models and their control wasevaluated in simulations and compared with real data from the traffic inPrague.x