Full Closure or Partial Closure? Evaluation of Construction Plans for the I-5 Closure in Downtown Sacramento
Publication: Journal of Transportation Engineering
Volume 139, Issue 3
Abstract
Three alternative construction plans with full highway closures and limited capacity closures (partial closures) are evaluated for a large-scale freeway reconstruction project in the Sacramento metropolitan area. By using a dynamic network analysis tool, the potential impact resulting from different construction plans is estimated and analyzed measured by changes in total demand, travel delays, vehicle miles/hours traveled (VMT/VHT), fuel consumptions, and emissions. The results show that, for this Interstate 5 closure, if only user delay costs are considered, the actual full closure plan is the best. It produces considerably less total system travel delay than the two partial closure plans although it closed more lanes. This plan, however, may induce more VMT than the other two. In fact, the other two partial closure plans produce slightly fewer emissions and consume slightly less fuel. The outcome of which plan comes out on top crucially depends on two other factors, besides the chosen objective: the amount of demand reduction a plan induces and the availability of alternative routes to divert traffic away from the work zone area. Developing efficient demand management measures will be the key to improving the network performance and to reduce the emissions. Moreover, when data are available, construction costs and emissions produced by construction activities should also be included in the evaluations, in addition to the user costs considered in this study.
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Acknowledgments
This research is funded by the Division of Research and Innovation (DRI) of Caltrans. We wish to thank Hassan Aboukhadijeh from the Division of Research and Innovation (DRI) of Caltrans for his project management support; Laurie Jurgens and Daniel Bui from Caltrans Division of Traffic Operations, and Joe Horton and John Holzhauser from Caltans District 3 for their assistance during various stages of this research. We assume full responsibility of the methods and results presented herein.
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Information & Authors
Information
Published In
Journal of Transportation Engineering
Volume 139 • Issue 3 • March 2013
Pages: 273 - 286
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Feb 21, 2012
Accepted: Sep 11, 2012
Published online: Sep 14, 2012
Published in print: Mar 1, 2013
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