Velocity Behavior and Road Alignment Safety Evaluation in Complex
Scenarios of Bridge and Tunnel Combination

doi:10.16097/j.cnki.1009-6744.2023.01.031

Abstract

Abstract: To clarify the "vehicle-road" coupling driving environment and alignment coordination of bridge and tunnel combination scenario of expressways in mountain cities, this paper conducted a natural driving test in the 3-tunnel-2- bridge combination scenario of the expressway in the main urban area of Chongqing. The real-time running speed of 18 drivers and the local speed of 13 cross-sections of vehicles were collected. An integrated alignment evaluation model was developed based on the road conditions and running speed data. The test results show that: in the tunnel-bridgetunnel multi-scene switching connection mode, the average speed distribution of the mainline section is 50.00 to 64.25 km·h-1 , drivers are most alert in the bridge section, and when driving from the bridge into the articulated ramp or tunnel entrance, the vehicle speed decreases significantly. Less than 15% of the vehicles can pass at a low speed or experience serious traffic congestions. The speed distribution is from 8.00 to 39.50 km· h-1 , The overall running safety of the test section is in good level and linear condition. The speed behavior control of the mountainous urban expressway bridge-tunnel combination scenario cannot merely rely on the traffic management of the single tunnel or bridge, but also need to consider the distance and the duration of signal control of the upstream road section.

Key words: traffic engineering, alignment evaluation, driving speed, mountain city, bridge and tunnel combination, tunnel entrance and exit

摘要： 为研究山地城市快速路桥隧组合场景的“车-路”耦合环境和线形协调程度，在重庆市主城区快速路3隧2桥组合场景开展自然驾驶实验，采集18名驾驶员的实时运行速度和13个断面的小型车地点车速，根据道路条件和运行速度数据构建线形综合评价模型。实验结果表明：在隧道-桥梁-隧道多场景切换连接方式中，主线路段的运行速度均值分布在50.00~64.25 km·h-1 ；驾驶员在桥梁路段行驶最为警惕，从桥梁驶进衔接匝道或隧道入口时，车辆速度明显减小，有15%以下的车辆会低速通行或经历严重的交通拥堵，其速度分布在8.00~39.50 km·h-1 ；验算实验路段的“车-路”耦合强度发现，实验路段整体运行安全状况水平良好，线形条件较好。对山地城市快速路桥隧组合场景的速度行为管控不能只依靠对单体隧道或桥梁的交通管理手段和治理措施，需考虑与上游道路衔接路段的距离和受信号控制的时长等。

关键词: 交通工程, 线形评价, 行驶速度, 山地城市, 桥隧组合场景, 隧道进出口

CLC Number:

U491.254

BAI Jing-rong, TANG Bo-ming, LIU Rui-hang, BI Hui-yun. Velocity Behavior and Road Alignment Safety Evaluation in Complex Scenarios of Bridge and Tunnel Combination[J]. Journal of Transportation Systems Engineering and Information Technology, 2023, 23(1): 295-304.

白婧荣, 唐伯明, 刘瑞航, 毕辉云. 桥隧组合复杂场景速度行为特性及线形评价[J]. 交通运输系统工程与信息, 2023, 23(1): 295-304.

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URL: http://www.tseit.org.cn/EN/10.16097/j.cnki.1009-6744.2023.01.031

http://www.tseit.org.cn/EN/Y2023/V23/I1/295

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Velocity Behavior and Road Alignment Safety Evaluation in Complex Scenarios of Bridge and Tunnel Combination

桥隧组合复杂场景速度行为特性及线形评价

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