Journal of Jilin University(Engineering and Technology Edition) ›› 2023, Vol. 53 ›› Issue (11): 3122-3129.doi: 10.13229/j.cnki.jdxbgxb.20211420

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Multi-objective optimization of traffic signal timings based on dandelion algorithm

Xiu-feng CHEN1(),Yu-tong GUO1,Yue-chen WU2,Da-yi QU2(),Meng-yuan GAO1   

  1. 1.School of Civil Engineering,Qingdao University of Technology,Qingdao 266520,China
    2.School of Mechanical and Automotive Engineering,Qingdao University of Technology,Qingdao 266520,China
  • Received:2021-12-22 Online:2023-11-01 Published:2023-12-06
  • Contact: Da-yi QU E-mail:chenxiufeng@qut.edu.cn;dayiqu@263.net

Abstract:

In order to solve low signal control efficiency caused by traffic load difference at the intersection entrance, a multi-objective optimization method of traf?c signals based on dandelion algorithm is proposed. A model of delay unevenness between intersection lanes is established using Theil index to quantify the delay difference of vehicles within and between lanes in the same phase of signal cycle. Taking the cycle vehicle delay and the cycle delay unbalance degree as the objective function, a multi-objective optimization model of traf?c signals is established, and a multi-objective dandelion optimization algorithm is proposed to solve the timing optimization model. Two simulation environments are established taking the intersection of Changzhou Road and Yangzhou Road in Jiaozhou city, comparison and analysis are proposed on traffic efficiency of signal schemes designed by the method in this paper, Webster and NSGA-Ⅱ algorithm. VISSIM simulation shows that the vehicle delay and queue length are effectively reduced, which effectively improves the traffic efficiency of the intersection.

Key words: engineering of communication and transportation system delay imbalance, multi-objective timing optimization, Theil index, dandelion algorithm

CLC Number: 

  • U491

Fig.1

Channelization of approach and signal phasing"

Fig.2

Channelization and phase diagram of the intersection"

Fig.3

Current signal timings diagram"

Fig.4

Hourly traffic volumes"

Fig.5

Comparison curves of fitness evolution"

Fig.6

Effects comparison of two algorithms"

Fig.7

Optimization scheme of signal timings"

Table 1

Comparison of different signal schemes"

方案性能指标时段1时段2增长率/%
时段1时段2
Webster法周期时长/s163109--
车辆平均延误/(s·pcu-144.4038.70--
平均排队长度/m71.2964.64--
NSGA-Ⅱ周期时长/s135102-17.2-6.4
车辆平均延误/(s·pcu-137.2035.10-16.2-9.3
平均排队长度/m64.5661.55-9.44-4.78
MDOA周期时长/s11193-31.9-14.6
车辆平均延误/(s·pcu-134.7033.90-21.8-12.4
平均排队长度/m59.3157.89-16.8-10.44
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