浙江大学学报(工学版)  2020, Vol. 54 Issue (12): 2386-2394    DOI: 10.3785/j.issn.1008-973X.2020.12.013
 土木与交通工程

Improved numerical method for two-way arterial signal coordinate control
Jia-qi ZENG(),Dian-hai WANG*()
College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China
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Abstract:

A new improved numerical method was proposed aiming at the problem that the original numerical method cannot ensure the optimal solution. First, the range and mode of the movement of the ideal signal position were defined, and the concept of the initial ideal signal position was put forward. Then, a new definition of offset green ratio was proposed. The offset green ratio relative to the front and back initial ideal signal position were called the front and back projected green ratio, respectively. Finally, by finding the relationship between the green wave bandwidth and the front/back projected green ratio, it was proved that the change times of green wave bandwidth is equal to the number of intersections during the ideal signal movement. By pre-calculating the forward and back projected green ratio, redundant calculation of the loss green ratio was avoided after each movement of the ideal signal position. The results demonstrate that, the proposed method can obtain the maximum green wave bandwidth compared with the existing numerical method, and reduce the calculation amount when the results are the same.

Key words: traffic engineering    arterial signal coordination    numerical method    green wave bandwidth    signal offset

 CLC: U 491.2

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Jia-qi ZENG,Dian-hai WANG. Improved numerical method for two-way arterial signal coordinate control. Journal of ZheJiang University (Engineering Science), 2020, 54(12): 2386-2394.

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 图 1  理想信号位置布置方式 图 2  算例1干道布局 表 1  Di邻项差计算表 图 3  经典数解法得到的算例1理想信号布置位置 表 2  算例1各理想信号间距与匹配程度指标对应关系 表 3  算例1中a=380 m时的相位差计算 图 4  偏移绿信比示意图 图 5  偏移绿信比与投影绿信比图示 表 4  改进数解法的绿波带宽度计算表 表 5  算例2各理想信号间距与绿波带宽度对应关系 表 6  算例2中a=410 m时改进数解法绿波带宽计算表 表 7  算例2中a=410 m时各理想信号位置下的绿波带宽 图 6  改进数解法得到的算例2理想信号布置位置 图 7  算例2理想信号位置与绿波控制时距图 表 8  算例2中a=410 m时的相位差计算 表 9  算例3各理想信号间距与匹配程度指标对应关系 表 10  算例4各理想信号间距与匹配程度指标对应关系 表 11  不同n下各方法的运算次数
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