Civil Engineering, Traffic Engineering |
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Simultaneous optimization model of signal phase design and timing at intersection |
Kai LU1( ),Xin TIAN1,Guan-rong LIN2,*( ),Xing-dong DENG3 |
1. State Key Laboratory of Subtropical Building Science, School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510641, China 2. Shenzhen Urban Transport Planning Center Co. Ltd, Shenzhen 518021, China 3. Guangzhou Urban Planning and Design Survey Research Institute, Guangzhou 510060, China |
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Abstract The objective function of phase time allocation based on vehicle demand was proposed, and the basic model for phase time allocation of intersections with pedestrian crossing constraints was established, considering the traffic demands of non-critical movement, overlap phase movement, interrupted phase movement and pedestrian. The optimization model of phase design scheme was established, aiming at the optimization problem of multiple optional signal phase design schemes and combined with the basic model for phase time allocation of intersections. The proposed model can realize the synchronous optimization of intersection phase design and signal timing. A multi-round phase time allocation model was presented, for the phase time allocation of multiple overlap phase movement, interrupted phase movement and non-critical movement. The phase time allocation process was given and a simultaneous optimization method of signal phase design and timing at intersection was proposed based on the proposed allocation model. Case analysis shows that the model can optimize signal phase structure and allocate phase time in multiple rounds. It can deal with the complex phase design conditions such as overlap phase, interrupted phase and repeated phase, and take into account the demand of pedestrian crossing, so as to better ensure the overall operation efficiency of intersections.
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Received: 19 November 2019
Published: 05 May 2020
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Corresponding Authors:
Guan-rong LIN
E-mail: kailu@scut.edu.cn;linguanrong@sutpc.com
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交叉口信号相位设置与配时同步优化模型
考虑非关键车流、跨相位车流、隔相车流和行人过街的通行需求,提出基于机动车通行需求的相位时间分配目标函数,建立行人过街约束下的交叉口相位时间分配基础模型;针对多种信号相位设计方案的优选问题,结合相位时间分配基础模型,建立相位设计方案优选模型,实现交叉口相位设置与信号配时的同步优化;针对多股跨相车流、隔相车流及非关键车流的通行时间分配问题,建立交叉口相位时间多轮分配模型,给出交叉口信号相位时间的分配流程,设计相位设置与信号配时的同步优化方法. 案例分析表明,所提模型能够通过对信号相位结构的优化与相位时间的多轮分配,实现信号相位设计方案的优选,能够处理搭接、隔相、重复相位等复杂相位设计情况,并兼顾行人过街需求,从而更好地保证交叉口的整体运行效率.
关键词:
交通工程,
交通信号控制,
信号相位设置,
相位时间,
多轮分配,
跨相位车流
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