1. School of Transportation, Wuhan University of Technology, Wuhan Hubei 430063, China;
2. Urban Research Center, Fuzhou Planning Design & Research Institute, Fuzhou Fujian 350003, China
An Optimization Method of Signal Control for a Four-leg Roundabout Based on the Single Release Method
ZUO Jun-zhong1,2, XU Liang-jie1, NI Long-he1
1. School of Transportation, Wuhan University of Technology, Wuhan Hubei 430063, China;
2. Urban Research Center, Fuzhou Planning Design & Research Institute, Fuzhou Fujian 350003, China
摘要A single release method for four-leg roundabouts is proposed. To completely use the time and space resources of roundabouts from the aspects of adjacent entrances and T-type storage spaces of the circulating lane, two types of optimized single release signal control models for a four-leg roundabout are presented. The coordination of signal phase design on the two types of optimized control models is presented, the phase coordination calculation is described in detail, and the original cycle length model is improved. By comparing the delays of the two optimized signal control models, the applicable conditions for optimized signal control models are discussed. Finally, considering the Tanxi Road/Changhong Road Roundabout in Xiangcheng, Xiangyang, as an example, the effectiveness of the presented optimized control models is evaluated. Simulated results show that the traffic flow at this roundabout is improved when the optimization methods are applied.
Abstract：A single release method for four-leg roundabouts is proposed. To completely use the time and space resources of roundabouts from the aspects of adjacent entrances and T-type storage spaces of the circulating lane, two types of optimized single release signal control models for a four-leg roundabout are presented. The coordination of signal phase design on the two types of optimized control models is presented, the phase coordination calculation is described in detail, and the original cycle length model is improved. By comparing the delays of the two optimized signal control models, the applicable conditions for optimized signal control models are discussed. Finally, considering the Tanxi Road/Changhong Road Roundabout in Xiangcheng, Xiangyang, as an example, the effectiveness of the presented optimized control models is evaluated. Simulated results show that the traffic flow at this roundabout is improved when the optimization methods are applied.
左俊中, 徐良杰, 倪龙和. 基于单口放行的四路环交信号控制优化方法[J]. Journal of Highway and Transportation Research and Development, 2014, 8(1): 78-83.
ZUO Jun-zhong, XU Liang-jie, NI Long-he. An Optimization Method of Signal Control for a Four-leg Roundabout Based on the Single Release Method. Journal of Highway and Transportation Research and Development, 2014, 8(1): 78-83.
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2014, Vol. 8 
