Abstract

In view of the network carrying capacity limit under over-saturated condition, a split allocation model of intersection group was developed, which takes total network delay, total output and total queue length as a comprehensive evaluation index. Based on the analysis of the influence of traffic flow turning, road section capacity, signal cycle length and split on traffic control, under the condition of network carrying capacity limit, the global optimization of intersection group splits was realized, taking the network traffic operation state as the basic judgment criterion and the corresponding constraint conditions were constructed. The numerical example analysis and simulation results show that the proposed model can ensure the traffic signal control effect under the premise of different demand states and control objectives, so that the effective prevention and quick dredging of traffic congestion can be realized under the condition of the network carrying capacity limit.

Highlights

  • The traffic congestion at the network level means that the key sections and intersections that play the supporting role of the network skeleton reach the limit of traffic capacity

  • Under the condition of network carrying capacity limit, the coupling correlation between signalized intersections which can directly intervene and regulate is strengthened, and the adjustment of single intersection signal control scheme is bound to have an impact on its adjacent intersections, while the traditional traffic signal control based on point or line level is limited to the improvement of local traffic conditions, which can not fundamentally solve the traffic congestion problem

  • Define an over-saturated intersection group control network G=(P, A), Where P is the set of network nodes and A is the set of road sections

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Summary

Introduction

The traffic congestion at the network level means that the key sections and intersections that play the supporting role of the network skeleton reach the limit of traffic capacity. Ernesto [1] and Girianna [2] developed a global optimization model of the split and a regional coordinated control model, respectively. Daganzo [3] proposed an optimal design method of over-saturated coordinated control based on CTM. K. Aboudolas [4,5] proposed a real-time regional signal control strategy based on rolling rule quadratic planning for the congested traffic state of urban large-scale road network.

Basic assumptions
Split allocation model
Model variable relationship and constraints
Criteria for judging the state of network traffic
Case study
Simulation experiment
Findings
Conclusions
Full Text
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