A Computational Optimization Model for the Capacity of Urban Roads

Based on the analysis of computation models of road capacity,an optimization model that considers the impacts of traffic management on road capacity is developed.Based on analysis to several actions related to traffic manage-ment,a computation model using the reduction factor to consider the action related to pedestrian management factors is also developed.According to the survey data of traffic speed and volume collected on road sections in Zhuhai,the model with or without the impact of pedestrian management is verified.Vissim is used to simulate the maximum traffic volume under the above 2 conditions.The proposed optimization model of road capacity is also verified.The results show that rel-ative errors between the theoretical capacity and the simulated values under the 2 different conditions are within 5%.It is found that the optimization model that considers the actions related to the above traffic management is reasonable and it also is superior to the traditional models which only consider road and traffic condition.