Most of the existing researches on left turn forbiddance merely focus on transportation design at a single intersection such as U-turn, continuous flow intersection design and so on to solve left turn detour problem. However, from multi-intersections angle, where to prohibit left turn is rarely studied. In this paper, left turn forbiddance model on multi-intersections along arterial road is proposed. Two objectives, capacity maximization and the capacity matching along arterial road, are investigated. The best locations to prohibit left turn along arterial road, the cycle length and the green time ratio are proposed as the decision variable. Constraints including left turn detour distance, traffic flow conservation, green light duration, degree of saturation, cycle length and so on are considered. This problem has been formulated to a mixed integer linear model and the branch-and-bound method is employed to solve the model. Wei-er Road located in Jinan city is employed as an example for numerical analysis. The results clearly indicate that, compared with the field model and Synchro-based model, the proposed model can effectively reduce the average vehicle delay, improve the overall capacity, reduce the queue length, and make traffic flow well-distributed along arterial road.
