Abstract
In order to alleviate the problem of the oversaturation of intersections, a traffic control method using a main-signal and pre-signals to periodically control the direction of dynamic waiting lanes was proposed in this paper. Based on the research on vehicle delay at intersections with dynamic waiting lanes and constraint relationships among a set of timing elements of the main-signal and pre-signal, a coordinated control model of a main-signal and pre-signal was built to minimize the average delay. Finally, a case study was performed to show that the proposed model is feasible. The objective optimization was performed by using a genetic algorithm to determine the main-signal and pre-signal timing scheme of the case study intersection, and then the average delay before and after installing dynamic waiting lanes was calculated and analyzed. The proposed method was found to be effective in reducing the intersection delay by 31.8% compared with the present situation of the intersection. Subsequently, the traffic volumes in the directions with dynamic waiting lanes installed were changed. It was demonstrated that with increasing traffic volumes, the effectiveness of the model to reduce intersection delay would be significant.
Highlights
In recent years, the vehicle population of some developing countries like China has been increasing, and frequent traffic jams have spread from large cities to small and medium-sized cities
Li et al [15] and Chen et al [16] studied the method of setting the pre-signal at an intersection of variable lanes, with the aim of solving the problem of traffic jams and idle lanes caused by the uneven distribution of traffic flow
The coordinated control model of the main-signal and pre-signal to minimize the average delay at the intersection is built
Summary
The vehicle population of some developing countries like China has been increasing, and frequent traffic jams have spread from large cities to small and medium-sized cities. Li et al [15] and Chen et al [16] studied the method of setting the pre-signal at an intersection of variable lanes, with the aim of solving the problem of traffic jams and idle lanes caused by the uneven distribution of traffic flow. This method could not, mitigate traffic congestion problems produced by intersection oversaturation. (2) The impact of right-turn traffic is not considered in this paper; (3) The drivers follow the driving rules of the dynamic waiting lane; (4) The vehicles arrive at and leave the intersection evenly according to the linear law
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