Evaluation Method for Nighttime Visual Space Improvement on Mountain Roads

Authors

ZHAO Yan, Xi’an Highway Research Institute Co ., Ltd., Xi’an, Shaanxi 710065, China; Shaanxi Transportation Holding Green Science and Environmental Protection Co ., Ltd., Xi’an, Shaanxi 710100, ChinaFollow
CHEN Yanli, Xi’an Highway Research Institute Co ., Ltd., Xi’an, Shaanxi 710065, China
CHEN Jiale, Xi’an Highway Research Institute Co ., Ltd., Xi’an, Shaanxi 710065, China

Abstract

To address issues such as poor visual guidance,narrow field of view,and short sight distance during nighttime driving on mountain roads,this study proposed a visual space enhancement evaluation method applicable to mountainous roads at night.By integrating active and passive traffic safety facilities,a visual space enhancement strategy adapted to the nighttime environment of mountain roads was proposed.A multidimensional evaluation indicator for visual space was established based on co-simulation.The effectiveness of the strategy was verified from the perspectives of visual space expansion and driving safety improvement by taking a trunk highway in the Qinling mountainous region as a case study.The results show that the proposed visual space enhancement measures can significantly increase effective sight distance and improve driving safety,especially on high-risk road sections such as complex curves and steep longitudinal slopes,where they can effectively reduce the risk of traffic accidents.

Publication Date

12-24-2025

DOI

10.14048/j.issn.1671-2579.2025.06.029

First Page

254

Last Page

260

Submission Date

December 2025

Recommended Citation

Yan, ZHAO; Yanli, CHEN; and Jiale, CHEN (2025) "Evaluation Method for Nighttime Visual Space Improvement on Mountain Roads," Journal of China & Foreign Highway: Vol. 45: Iss. 6, Article 29.
DOI: 10.14048/j.issn.1671-2579.2025.06.029
Available at: https://zwgl1980.csust.edu.cn/journal/vol45/iss6/29

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