ORIGINAL RESEARCH article
Front. Built Environ.
Sec. Transportation and Transit Systems
Volume 11 - 2025 | doi: 10.3389/fbuil.2025.1540170
This article is part of the Research TopicNovel Technologies in Structural Health Monitoring and Digital Management of Transportation InfrastructuresView all articles
Study on the Length of Speed Change Lanes at the Entrance and Exit of Two-Way Ten-Lane Expressways
Provisionally accepted
- 1Guangdong Transportation Group Co., Ltd, Guangzhou, China
- 2North China University of Technology, Beijing, China
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As the economy continues to develop rapidly, traffic volume on highways has increased dramatically, leading to increasingly severe congestion issues. In response, expanding expressways to two-way ten-lane configurations has become a mainstream strategy to alleviate traffic pressure. Given the absence of unified national standards for the design of two-way ten-lane highways, this study explores the relationship between the form and design parameters of speed change lanes. Using VISSIM simulation and the Surrogate Safety Assessment Model (SSAM), we investigate the impact of different speed change lane lengths on traffic efficiency and safety under various traffic flow conditions on renovated and expanded two-way ten-lane highways. Key performance indicators include average delay time, average queue length, number of conflicts, and Post-Encroachment Time (PET). The results show that, at a mainline design speed of 120 km/h, a 270-meter acceleration lane reduces conflicts by 47.6% compared to conventional lengths, while a 161meter deceleration lane achieves a 32.8% reduction. This study provides crucial insights for the rational design of speed change lane lengths on two-way ten-lane highways, ultimately enhancing road capacity, improving safety, and optimizing traffic resource allocation.
Keywords: Two-way Ten-lane Expressway, Speed change lane, SSAM, Acceleration lane length, Deceleration lane length, VISSIM
Received: 05 Dec 2024; Accepted: 25 Jun 2025.
Copyright: © 2025 xiong, yu and Guo. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Huihui Guo, North China University of Technology, Beijing, China
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