Modeling and simulation of red light running violation at urban intersections

More occupant injuries occurred in red light running conflicts, compared to other urban conflict types. And red light running behavior of vehicles happens at urban intersections is caused by high approach speeds coupled with aggressive driving. It includes inadvertently red light running that is easy to arouse the sympathizing of traffic managers other than advertently behavior of driver that should be punished. The reason and characteristic of inadvertently red light running is related with width of urban intersection, idea speed, vehicle dynamics nature, yellow interval of signal and dilemma zone. Further more, to enhance inspection and punishment upon red light running violations and to setup rational signal phases and intervals obviously can decrease red light running behaviors. And that safety and reasonable signal phase and intervals should be designed at intersections, also enforcement tolerance for photo red light programs should be considered would reduce dilemma zone. A model of dilemma zone upon inadvertently red light running has been presented, also an example at partial intersections in Xi'an. According to the above ideas, models suitable for red light running at urban intersections are established. The model has been calibrated and tested with data from local area of Xi'an, west in China.