Abstract
To study the minimum safe distance required for tunnel group and interconnecting sections when exit warning signs are set inside tunnels on mountainous expressways with small distances between tunnel group and interconnecting exits, this paper first built a safety distance calculation model based on factors such as the driver's eye movement characteristics, lane changing behavior, and road service level. Secondly, it designed real vehicle experiments to collect eye movement data of drivers in different tunnel environments, and adopted cluster analysis to calculate the relationship between tunnel length and light adaptation distance. Additionally, based on the lane changing characteristics of vehicles, the lane changing distance of vehicles at different road service levels was calculated. Finally, the minimum safe distance between tunnel groups of different tunnel types and service levels was calculated based on the model. The results show that at the same service level, the longer tunnel length means greater required minimum safety distance. However, when the tunnel length exceeds 3000 m, the minimum required safety distance tends to be a constant value. Under the same tunnel type, the higher road service level leads to smaller required minimum safety distance.
Publication Date
11-8-2022
DOI
10.14048/j.issn.1671-2579.2022.05.047
First Page
257
Last Page
262
Submission Date
April 2025
Recommended Citation
Ting, Shang; Peng, Wu; and Qijin, Sheng
(2022)
"Study on Safe Distance between Tunnel Group and Interconnecting Section of Mountain Expressway,"
Journal of China & Foreign Highway: Vol. 42:
Iss.
5, Article 47.
DOI: 10.14048/j.issn.1671-2579.2022.05.047
Available at:
https://zwgl1980.csust.edu.cn/journal/vol42/iss5/47
Reference
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