Analysis of Car-Following Behaviors under Different Conditions on the Entrance Section of Cross-River and Cross-Sea Tunnels: A Case Study of Shanghai Yangtze River Tunnel

Ting Zhang, Feng Chen, Yadi Huang, Mingtao Song and Xiao Hu ()
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Ting Zhang: The Key Laboratory of Road and Traffic Engineering, Ministry of Education Tongji University, Shanghai 201804, China
Feng Chen: The Key Laboratory of Road and Traffic Engineering, Ministry of Education Tongji University, Shanghai 201804, China
Yadi Huang: China Academy of Urban Planning and Design, Western Branch, Chongqing 400000, China
Mingtao Song: Traffic Science and Technology of Guangdong Hualu Limited Company, Guangzhou 510420, China
Xiao Hu: Shanghai Urban Operation (Group) Co., Ltd., Shanghai 200023, China

IJERPH, 2022, vol. 19, issue 19, 1-21

Abstract: Compared to highway road tunnels, the entrance section of cross-river and cross-sea tunnels feature long and steep slopes. Along with a complicated traffic environment and harmful weather conditions, traffic congestion and rear-end crashes occur frequently during car-following in cross-river and cross-sea tunnels. It is necessary to examine the impact of traffic flow and weather conditions on car-following behavior at the entrance section of cross-river and cross-sea tunnels. To this end, this paper first extracted the vehicle speed data based surveillance video at the entrance of the Shanghai Yangtze River Tunnel. Moreover, the actual average speed under different traffic flow conditions was obtained through the clustering algorithm, which was used as the basis for setting the experimental parameters. Then, in the driving simulation experiment, three traffic flow conditions (free flow, congested flow, and jam flow) were set up in three weather conditions (sunny, rainy, and snowy), and a risk situation was set up in each condition. Distance headway, time headway, acceleration, lateral offset, and driver’s emergency response time were collected. Moreover, seven slopes of 2% to 5% were set, and the relationship of slope on longitudinal speed and lateral offset was analyzed. ANOVA and post-hoc analyses were applied. The result indicates that traffic flow conditions have a significant effect on the car-following behavior, while weather conditions mainly influence the time headway. Moreover, drivers tend to adopt more cautious driving behavior as the distance between the vehicle and the tunnel entrance decreases. The results also show that the slope of the cross-river and cross-sea tunnel entrance section has a major influence on vehicle speed.

Keywords: traffic safety; car-following behavior; entrance section of cross-river and cross-sea tunnels (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2022
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