System Simulation
Programming Languages: Design and Implementation
Programming Languages: Design and Implementation
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Population explosion in larger cities and increase in vehicle density cause traffic problems in these areas. Intersections are the places where traffic is mostly blocked and most of the accidents occur. Signalization lights at the intersections aim to arrange the traffic flow and to avoid accidents. If not located properly or have bad timing, not only they fail to avoid accidents but also they cause disobeying, time loss and wearyness.Traffic assignment and management deal with those problems to minimize personal and social cost. The results of some mathematical models are applied. It is not easy to predict the cost of any decisions reached about traffic assignment and management, yet, using simulation, those decisions can be tested on a model representing the traffic network and the results thus can be seen before implementation.This study introduces a special purpose simulation program package developed for urban traffic network. The input of the package is data on roads, intersections, signalization lights, stops, traffic load and objective function parameters. Required changes to test differing management decisions can be made easily through keywords supplied and simulation may be repeated. A powerful user language designed and developed for use in data input, operation, and output is also an integral part of the package. Waiting times of vehicles, time and distance of trip, average speed, queue lengths and other statistical results are the output of the package. Such results can also be utilised automatically in evaluating a cost function declared by user in order to test various traffic management decisions.