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原文传递 Stability Analysis and Speed-Coordinated Control of Mixed Traffic Flow in Expressway Merging Area

题名：	Stability Analysis and Speed-Coordinated Control of Mixed Traffic Flow in Expressway Merging Area
正文语种：	eng
作者：	Wei Hao;Donglei Rong;Zhaolei Zhang;Young-Ji Byon;Nengchao Lv;Ying Chen
作者单位：	Hunan Provincial Key Laboratory of Smart Roadway and Cooperative Vehicle-Infrastructure Systems Changsha Univ. of Science and Technology Changsha Hunan 410114 China;School of Traffic and Transportation Engineering Changsha Univ. of Science and Technology Changsha Hunan 410114 China;School of Traffic and Transportation Engineering Changsha Univ. of Science and Technology Changsha Hunan 410114 China;Dept. of Civil Infrastructure and Environment Engineering Khalifa Univ. of Science and Technology. Abu Dhabi 127788 United Arab Emirates;Intelligent Transportation Systems Research Center Wuhan Univ. of Technology Wuhan Hubei 430063 China;College of Architecture Changsha Univ. of Science and Technology Changsha Hunan 410114 China
关键词：	Speed cooperative control; Stability analysis; Mixed traffic flow; Merging area; Numerical simulation
摘要：	This paper considers the stability of mixed traffic flow and the necessity of speed control to achieve safety and efficiency goals. Therefore, a speed-coordinated control model is proposed for mixed traffic flow based on stability analysis at an expressway merging area. Firstly, stability intervals are obtained by using an intracluster stability analysis in an intercluster. Secondly, a speed-coordinated control model is set up considering the stability characteristics in a merging area. Finally, an objective function is developed, which considers time-to-collision (TTC), dynamic space occupancy (DSO), and vehicle specific power (VSP). A numerical simulation is built up to analyze the traffic conditions and stability by using the proposed model against a null scenario without using the proposed model. The analysis results indicate that the stability of the intracluster has two regions, and the stability of the intercluster is mainly affected by the speed fluctuation and the distance between the merging cluster and the vehicles on the main road. Secondly, the proposed model tends to gradually achieve a steady state when the position reaches 180 m. Meanwhile, the efficiency of the model is found to be the best when the minimum safe-distance interval is set at (18, 27). In addition, the volatility of TTC drops by 5% and the DSO has reached 11.99% in the acceleration lane optimization together with 18.37% in the main lane optimization. The frequency is found to be the highest when the VSP reaches (10, 20), and the optimized efficiency reaches 45%-50%. The model proposed in this paper will effectively analyze the stability characteristics of mixed traffic flow and provides a research foundation for the stability of mixed traffic flow. Moreover, this model builds up a multi-objective- oriented speed-coordinated control scheme for high-efficiency operations in the merging area and provides technical support for traffic management in the future.
出版年：	2022
期刊名称：	Journal of Transportation Engineering
卷：	148
期：	11
页码：	04022098.1-04022098.14