|Table of Contents|

Traffic capacity enhancement strategy for urban expressway diversion area under vehicle-infrastructure cooperative environment(PDF)

《交通运输工程学报》[ISSN:1671-1637/CN:61-1369/U]

Issue:
2022年03期
Page:
126-138
Research Field:
交通信息工程及控制
Publishing date:

Info

Title:
Traffic capacity enhancement strategy for urban expressway diversion area under vehicle-infrastructure cooperative environment
Author(s):
LI Rui1;  RAN Bin2;  QU Xu2
(1. College of Civil and Transportation Engineering, Hohai University, Nanjing 210024, Jiangsu, China; 2. School of Transportation, Southeast University, Nanjing 211198, Jiangsu, China)
Keywords:
intelligent transportation system;  vehicle-infrastructure cooperative;  improved cellular automata model;  lane-changing influence analysis;  diversion area;  traffic capacity enhancement
PACS:
U491.112
DOI:
10.19818/j.cnki.1671-1637.2022.03.010
Abstract:
According to the mixed traffic flow characteristics of vehicles including different types of automatic vehicles(AVs)and human-driven vehicles(HVs)in the urban expressway diversion area under a vehicle-infrastructure cooperative environment, the dynamic acceleration and variable lane-changing probability were introduced to improve the traffic flow rules of a cellular automata model. The lane-changing simulation experiments in the diversion area were designed by considering the coupling influence of factors such as the penetration rate of AVs on the main road, proportion of large vehicles, penetration rate of off-ramp AVs, rate of off-ramp vehicles, number of off-ramp lanes, and distance before lane-changing. The influences of indicators including the free lane-changing rate and average distance before lane-changing of off-ramp vehicles were compared and analyzed under multi-factor coupling actions, and change rules of road capacity of the urban expressway diversion area were studied. On the basis of the variable distance before lane-changing, a strategy for improving the road capacity of the diversion area with mixed traffic flows was proposed. Analysis results show that the road capacity improves as the free lane-changing rate of off-ramp vehicles in the diversion area increases. The penetration rate of AVs on the main road has the most significant impact on the road capacity, and the road capacity under the environment with fully AVs is twice that under the environment with fully HVs. The impact of the number of off-ramp lanes on the road capacity is not significant, and the road capacity of two off-ramp lanes improves by about 3%, compared with that of one off-ramp lane. The distance before lane-changing greatly affects the road capacity, and the road capacity of the diversion area enhances by 9.6%-10.6% when the distance before lane-changing increases from 100 m to 150 m. Therefore, mobile traffic signs can be utilized to guide vehicles to change lanes in advance, which can significantly enhance the traffic capacity of the diversion area. 1 tab, 20 figs, 31 refs.

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Last Update: 2022-07-20