Research On Optimization Model Of Lane-By-Lane Single Intersection Actuated Control

Intersection is an important part of the city roadway-meshwork, intersection signal control influenced the degree unobstructed city roads significantly. There are two control schemes at the single control intersection: fixed time control and actuated control. According to actual traffic information from detectors, actuated control can adjust traffic signal dynamically, effectively overcome the lack of control of the induction signal timing control. Actuated control should be the trend of urban intersection signal control in the future. Studies on the actuated signal control can not only ease urban traffic congestion and improve urban road capacity, but also reduce the incidence of traffic accidents and environmental pollution to some extent. Because actuated control parameters and strategies have a great impact on control efficiency, considering the control parameters and strategies, the minimum green time, maximum green time and the optimization model of green time termination condition are proposed in this paper.This paper consulted the existing research of actuated signal control, including the method of determining the parameters, logic optimization, layout method of detections and optimization methods, and analyzed the existing deficiencies and problems. The present actuated signal control for parameters optimization is mostly based on single-channel model, the effect of multi-lane optimization is limited, which doesn’t consider the impact of multi-lane for the control parameters. There are some problems of the actuated control logic optimization in the existing literature, the decisive condition of the green extend time termination condition is simply based on extension green time and headway, without considering the signal received headway is less than the actual headway, and yet consider two opposite import channels headway time influence for the green time to extend.Firstly, on the basics of analyzing the relationship between minimum green time, vehicle traffic delays and security relations, establish the single-channel minimum green time optimization model and design the corresponding algorithm is designed in this paper, then the lane-by-lane minimum green time optimization model is established which is based on the multi-lane condition. Secondly, the relationship between the lane-by-lane extension green and multi-channel headway was analyzed and the lane-by-lane green time extension model in a variety headway distribution was established. The maximum green time optimization model was proposed on this basis. Thirdly, based on the analysis of green extension termination conditions and Lane-by-lane and multi-lane road opposite relationship light to extend the time termination condition optimization was obtained, and the traditional programs were compared with the programs proposed in this paper. Finally, the optimization model and the optimization solution were simulated using the VISSIM system. The simulation results showed that the proposed model has a better control effect in different saturation situations compared with the conventional actuated control methods.