Quantitative Risk Assessment Modeling for Nonhomogeneous Urban Road Tunnels

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Title Quantitative Risk Assessment Modeling for Nonhomogeneous Urban Road Tunnels
Author Meng, Qiang; Qu, Xiaobo; Wang, Xinchang; Yuanita, Vivi; Wong, Siew Chee
Journal Name Risk Analysis
Year Published 2011
Place of publication United States
Publisher Wiley-Blackwell Publishing, Inc.
Abstract Urban road tunnels provide an increasingly cost-effective engineering solution, especially in compact cities like Singapore. For some urban road tunnels, tunnel characteristics such as tunnel configurations, geometries, provisions of tunnel electrical and mechanical systems, traffic volumes, etc. may vary from one section to another. These urban road tunnels that have characterized nonuniform parameters are referred to as nonhomogeneous urban road tunnels. In this study, a novel quantitative risk assessment (QRA) model is proposed for nonhomogeneous urban road tunnels because the existing QRA models for road tunnels are inapplicable to assess the risks in these road tunnels. This model uses a tunnel segmentation principle whereby a nonhomogeneous urban road tunnel is divided into various homogenous sections. Individual risk for road tunnel sections as well as the integrated risk indices for the entire road tunnel is defined. The article then proceeds to develop a new QRA model for each of the homogeneous sections. Compared to the existing QRA models for road tunnels, this section-based model incorporates one additional top event—toxic gases due to traffic congestion—and employs the Poisson regression method to estimate the vehicle accident frequencies of tunnel sections. This article further illustrates an aggregated QRA model for nonhomogeneous urban tunnels by integrating the section-based QRA models. Finally, a case study in Singapore is carried out.
Peer Reviewed Yes
Published Yes
Alternative URI http://dx.doi.org/10.1111/j.1539-6924.2010.01503.x
Copyright Statement Copyright 2011 Society for Risk Analysis. This is the author-manuscript version of the paper. Reproduced in accordance with the copyright policy of the publisher. The definitive version is available at http://onlinelibrary.wiley.com
Volume 31
Issue Number 3
Page from 382
Page to 403
ISSN 1539-6924
Date Accessioned 2012-03-05
Language en_US
Research Centre Urban Research Program
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Transport Engineering
URI http://hdl.handle.net/10072/44473
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1x

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