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JMT 2011, Vol. 19 Issue (1) :68-74    DOI: 10.3969/j.issn.2095-087X.2011.01.010
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An approach to optimize the settings of actuated signals
Xinguo JIANG1, Yanjun QIU2, Sheng RUAN3*
1. School of Transportation and Logistics, Southwest Jiaotong University, Chengdu 610031, China;
2. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China;
3. Zhejiang Provincial Hongtu Transportation Construction Co., Ltd., 2031 Jiangling Road, Hangzhou 310003, China

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Abstract Traffic-actuated signal employs relatively complex control logic to regulate traffic flow.Introduction of control variables into the traffic-actuated system contributes to system operational flexibility and complexity,and also complicates the system with uncertainties.The paper proposes two tentative methods to optimize the actuated signal parameters:basic requirements of controller parameters and analytical model,and macroscopic computer simulation.It is concluded that when the actuated signal operates within the volume/capacity range of 0.4 to 0.6,it will create the most significant benefits;the research suggests that minimum green time in the main street shall be set long enough to meet the required demand,preferably at the 60 of the main street capacity.In order to ensure less control delay in a semi-actuated intersection,relatively small values of vehicle extension(e.g.,2.5 s) and maximum green time are recommended to be assigned to the less important street.
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Xinguo JIANG
Yanjun QIU
Sheng RUAN
Keywordsactuated signals   optimization   parameter settings   computer simulation     
Received 2011-02-25;
Fund:The research is supported by the Fundamental Research Funds for the Central Universities(SWJTU09CX042) and National Natural Science Foundation of China (NSFC-50978222).
Cite this article:   
Xinguo JIANG, Yanjun QIU, Sheng RUAN.An approach to optimize the settings of actuated signals[J]  JMT, 2011,V19(1): 68-74
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http://jmt.swjtu.edu.cn/EN/10.3969/j.issn.2095-087X.2011.01.010      or     http://jmt.swjtu.edu.cn/EN/Y2011/V19/I1/68
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