Prefabricated Elements Case Study
Principal investigator: Tom Maze
Other authors: Jonathan Wiegand
Student researcher: Jonathan Wiegand
Start date: 07/01/06
End date: 06/30/07
Report: June 2007, http://www.intrans.iastate.edu/smartwz/reports/2007-maze-prefab-elements.pdf 566 kb (*pdf)
Related publications: Prefabricated Elements Case Study 106 kb *pdf (Tech transfer summary) August 2007
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Sponsor(s):Midwest Transportation Consortium
Smart Work Zone Deployment Initiative
About the research
Abstract: Prefabricated elements have the opportunity to reduce the duration of closed lanes during highway reconstruction. Typically, an element that is prefabricated off-site and installed, rather than being constructed in-place, diminishes the duration of on-site construction activities and, therefore, minimizes the disruption and congestion of traffic due to shorter duration lane closures. This case study presents an analysis of the benefits and costs of using prefabricated pavement panels.
The case study involves a small panel replacement project, conducted by the Minnesota Department of Transportation, involving the installation of precast concrete pavement panels. The installation segment consisted of a 218 ft. continuous stretch of 12 ft. wide pavement. The objective of the test project was to evaluate the use of precast pavement panels to reduce construction time, thus reducing overall and continuous motorist delay due to a lane closure.
The results of the benefit-to-cost analysis conducted as part of this case study suggest that for small projects that consist of only a few panels, using prefabricated panels to reduce work zone user costs is cost-effective; however, as projects involve more prefabricated panels, the construction costs quickly escalate and become cost prohibitive.