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| Traffic Signal Timing Optimization Based on Improved Lagrange Multiplier Method |
| MU Liang, ZHAO Hong, CUI Xiangyu, YUAN Huantao, LI Yan, QIU Junzheng
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| College of mechanical & electrical engineering, Qingdao University, Qingdao 266071, China |
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Abstract In order to improve the traffic efficiency and environmental benefits of intersections, a new Lagrange multiplier method is proposed to optimize the traffic signal timing at intersections by improving penalty parameters. The mathematical model of vehicle delay and exhaust emission is established by weight coefficient, and optimized by improved Lagrange multiplier method. The results are compared with those of two typical intelligent algorithms, and verified by VISSIM (Verkehr in stadten simulation) microscopic traffic visualization simulation software. The experimental results show that the optimized signal timing can reduce vehicle delay by 19.89% and exhaust emissions by 2.379%. It can be seen that vehicle delay at intersections is greatly optimized and exhaust emissions can be reduced at the same time.
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Received: 26 March 2020
Published: 28 December 2020
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