What is it about?

The present study aims to investigate the crash characteristics analysis of the expressway long tunnels by proposing a novel zoning approach. Based on the findings of the study, various countermeasures to improve the traffic safety in long tunnels are reccomended.

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Why is it important?

Tunnels, as a part of expressway network, play an important role in improving the alignment standards, reduce travel time and protect ecological environment. However, due to its semi-enclosed space structure, the driving environment in the tunnels is different from that of the open road sections. Another effect is the drastic changes in the visual environment at the tunnel entrance and exit that might induce temporary ocular blindness. In addition, due to limited inner space, collisions in the tunnel are often more difficult to rescue, resulting in crashes with wide impacts, and with a high probability of secondary crashes. Therefore, an in-depth research on tunnel is of crucial importance and urgently needed.


This article is an attempt to improve the traffic safety in tunnels. Although tunnels have many advantages yet in the case of crash the outcomes are trouble some and severe. The author believe that the findings of this study will help the safety managers and practitioners to more easily understand the causes of the traffic crashes in long tunnels and how to overcome them.

Mr. Amjad Pervez
Central South University

Read the Original

This page is a summary of: Crash analysis of expressway long tunnels using a seven-zone analytic approach, Journal of Transportation Safety & Security, June 2019, Taylor & Francis,
DOI: 10.1080/19439962.2019.1605642.
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