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Abstract

The emergency lanes on expressways can be employed for vehicle passage during emergencies, and there is no precedent in China to open them for utilization in response to high traffic flow demands. To meet the demand for improving the high traffic capacity of Shanghai-Nanjing Expressway, this paper carried out emergency lane opening test design and on-site testing for the 2019 May Day holiday. Based on the theoretical analysis method and traffic flow monitoring data, traffic running parameters were analyzed in emergency lane opening conditions, with the influence of emergency lane opening on cross-sectional traffic capacity summarized and evaluated. The results indicate that the opening of emergency lanes has a significant effect on traffic flow in other lanes. Due to factors such as laws and regulations, and driving behavior, the free flow speed and traffic capacity of emergency lanes have not reached the single-lane design level. In experimental conditions, opening emergency lanes can increase the cross-sectional traffic capacity by about 10%.

Publication Date

8-18-2022

DOI

10.14048/j.issn.1671-2579.2022.04.046

First Page

252

Last Page

257

Submission Date

May 2025

Reference

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