Real-Time Traffic Signal Timing for Urban Road Multi-Intersection

Lin Dong,Wushan Chen

doi:10.4236/iim.2010.28058

Lin Dong, Wushan Chen

Open Access

https://doi.org/10.4236/iim.2010.28058

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Abstract

this paper develops a real-time traffic signal timing model which is to be integrated into a single intersection for urban road, thereby solving the problem of traffic congestion. We analyze the current situation of the traffic flow with release matrix firstly, and then put forward the basic models to minimize total delay time of vehicles at the intersection. The optimal real-time signal timing model (non-fixed cycle and non-fixed split) is built with the Webster split optimal model. At last, the simulated results, which are compared with conventional model, manifest the promising properties of proposed model.

Highlights

Traffic congestion is a severe problem at an intersection in urban, having been causing many critical problems and challenges in major and most populated cities around the world
Abstract—this paper develops a real-time traffic signal timing model which is to be integrated into a single intersection for urban road, thereby solving the problem of traffic congestion
We analyze the current situation of the traffic flow with release matrix firstly, and put forward the basic models to minimize total delay time of vehicles at the intersection

Summary

Introduction

Traffic congestion is a severe problem at an intersection in urban, having been causing many critical problems and challenges in major and most populated cities around the world. Signal timing is the technique to appropriately decide the signal cycle and effective green time or other factors, with respect to various intersections, phases, traffic flows and others. The conventional signal timing model by using fixed cycle and fixed split algorithm is less efficiencies to cause congestion problem. Critical Intersection Control (CIC) [5], is using real-time traffic data to better assign green times to conflicting movements. Based on the above research, this paper develops a real-time signal timing model (non-fixed cycle and non-fixed split). According to real-time traffic flows, the model decides the signal cycle and effective green to relieve the congestion problem. The fixed cycle and non-fixed split model is put forward to minimize total delay time of vehicles, which use the maximum road capacity as the control level. Integrated with the Webster split optimal model, the optimal real-time signal timing model (non-fixed cycle and non-fixed split) is obtained

Fixed Cycle and Non-Fixed Split Model

Optimized Model

Simulation

Conclusions