Mr. Hongbo Yi Profile

Hongbo Yi

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Proceedings Article | 16 February 2023 Paper

Research on 2+1 alternate highway setting in mountain area based on VISSIM simulation

Fenglin Hu, Yugang liu, Shaohua Zhang, Hongbo Yi, Gang Liu

Proceedings Volume 12591, 1259128 (2023) https://doi.org/10.1117/12.2668512

KEYWORDS: Roads, Safety, Design and modelling, Transportation, Computer simulations, Analytical research

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For a long time, the operation efficiency of highways in Sichuan plateau mountainous areas has been low, and overtaking accidents occur frequently. In addition, many places are limited by natural conditions and unable to build the two-way four-lane highway. Hence, this paper proposes a new scheme to transform and expand the two-lane road into a 2+1 alternate lane. We used VISSIM software, combined with the actual traffic characteristics of the Sichuan mountainous area, and integrated with the driving behavior features to conduct a simulation analysis on the geometric parameter design, setting influencing factors and applicability of 2+1 alternate highway. It not only fills the domestic research gap but also provides theoretical support for building a safe and efficient mountain traffic system. The study found: This scheme optimizes the service level while improving the operation efficiency. When the proportion of trucks exceeds 20%, prohibiting trucks from passing through overtaking lanes shows relatively higher service levels. 2+1 alternate highways in mountainous areas have significantly better service levels than other options when the overtaking lane length is set to 550-900m, and the speed limit in the single lane is 50-100km/h.

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