A Route Guidance Model Considering System Optimality and User Needs in Deterministic Route Choice Criteria

Congestion، delay and creation of long queues in urban networks make transportation authorities to take traffic management methods for optimizing the current capacity of infrastructures. One of the effective methods in this case is applying route guidance systems. Information and route guidance systems are a kind of intelligent transportation technologies which aid drivers to choose the proper route to their destinations. In this research، a route guidance system was developed which the operator (Traffic Management Center) can control the network by every level he wishes for. An overlapping parameter was introduced for every route which compares the cost of every route with the cost of the same one in system optimality condition. For modeling purpose، two programming model were applied which the first model produced the inputs of the second model. The second model، considering the overlapping factor and the tolerance limit of the operator، guide the users. In the introduced assignment process، when the overlapping parameter reaches the tolerance limit of the operator، the route will be eliminated from the guidable route set and other routes will be introduced and reachable for users. The developed model is tested for simple illustrative network. Results showed that the proposed pattern has the most effects in operator tolerance period from 1 to 1. 4. When the tolerance parameter of the operator reaches 1. 1، the total travel time of the network is decreased more than 13 percent. Also، results showed that only a little share of users (15 percent of users in most case) in comparison with UE condition will change their routes which promise the problems with disobedience of users and also validity of results.