Hazard-Based Analysis of Highway Project Development Times
Publication: Journal of Transportation Engineering
Volume 138, Issue 10
Abstract
Transport agencies around the world recognize the importance of on-time on-budget delivery of highway projects and understand the need for an efficient transport development process. Past studies of highway project duration and cost estimation were focused on construction, and few studies have focused on preconstruction project delivery from an agency’s perspective. This paper proposes the use of hazard-based duration models for investigating the potential risk factors that could affect project development time from planning to letting. A database containing over 35 years of highway project data from the state of Indiana was used to develop appropriate models. Of the three model forms (Weibull, Weibull with gamma heterogeneity, and log-logistic) considered in the paper, it was found that the log-logistic model is the most appropriate for modeling project development time. For each work category (pavement, bridge, and road/interchange projects), risk factors were identified, and their influences on project development time (and consequently, on letting time) were investigated. The developed hazard-based duration models were further applied to demonstrate their ability to predict expected project development time for delivery and the project-related factors that influence this duration, thereby providing the agency with a useful interpretation of associated delivery risks.
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Acknowledgments
This study was conducted under the Joint Transportation Research Program. The authors acknowledge the support of the Federal Highway Administration and the Indiana Department of Transportation. The contents of this paper reflect the views of the authors, who are responsible for the facts and the accuracy of the data presented. The contents do not necessarily reflect the official views or policies of the Indiana Department of Transportation or the Federal Highway Administration. This paper does not constitute a standard, specification, or regulation.
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Information & Authors
Information
Published In
Journal of Transportation Engineering
Volume 138 • Issue 10 • October 2012
Pages: 1259 - 1268
Copyright
© 2012 American Society of Civil Engineers.
History
Received: Aug 16, 2011
Accepted: Mar 6, 2012
Published online: Mar 8, 2012
Published in print: Oct 1, 2012
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