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Research Portfolio | Ongoing Research | Innovation Life Cycle | Roadmaps | Deployment Priority, Market-Ready Technologies and Innovations 2008Construction Analysis for Pavement Rehabilitation Strategies (CA4PRS)
Problem: State transportation agencies are increasingly shifting their focus from constructing new highways to rehabilitating and reconstructing existing facilities
We need to be able to build highways that are safer, longer lasting, and faster at a lower cost.
Furthermore, Highway rehabilitation projects often cause congestion, safety problems, and road accessibility issues. With this in mind, agencies face a challenge in finding economical ways to rehabilitate deteriorating roadways in metropolitan areas while also keeping the traveling public as safe as possible and minimizing disruptions for local communities and surrounding businesses.
Solution: The CA4PRS software identifies optimal rehabilitation strategies that balance the construction schedule with inconvenience to drivers and transportation agency costs
CA4PRS was developed under a Federal Highway Administration (FHWA) pooled-fund study by the Partnered Pavement Rehabilitation Center at the Institute of Transportation Studies, University of California (UC) Berkeley. California, Minnesota, Texas, and Washington State participated in the study. CA4PRS was selected by American Association of State Highway and Transporation Officials' (AASHTO) Technology Implementation Group as a 2006 priority technology and the International Road Federation Global Achievement Award for Research 2007.
CA4PRS identifies optimal rehabilitation strategies that balance the construction schedule with inconvenience to drivers and transportation agency costs. The program considers the "what if" scenarios for such variables as rehabilitation strategy; construction window (i.e., nighttime, weekend, or continuous closures); number of lanes to be closed for rehabilitation; material selection; pavement base type; and contractor logistics, including access to the site and production rates. The CA4PRS results can also be integrated with traffic simulation tools to estimate road user delay costs arising from construction. The software aids in establishing schedules, developing staging construction plans, estimating cost (A) + schedule (B) contracts, and calculating incentive and disincentive specifications for contracts.
Successful Applications: Confirming the effectiveness of the CA4PRS software through rehabilitation and reconstruction projects
CA4PRS was used with traffic simulation models to select the most economical rehabilitation scenario for the I-15 Devore Project. The 4.5-km concrete reconstruction project, which would have taken 10 months using traditional nighttime closures, was completed over two 9-day periods using one-roadbed continuous closures and around-the-clock construction. Implementing continuous closures rather than repeated nighttime closures in this project resulted in significant savings. Alternative strategies enabled by use of CA4PRS led to an accelerated project process dubbed "Rapid Rehab" that was praised by professionals.
Other sponsoring State Transportation Departments have also used CA4PRS for analyses of corridor rehabilitations. The Washington State DOT used it to analyze reconstruction of Interstate 5 through Seattle, and the Minnesota DOT used it to analyze the rehabilitation of interstates 394 and 494 in St. Paul.
Additional Resources
For more information, contact:
To request additional copies of this publication, contact:
TaMara McCrae
FHWA-HRT-08-033
This page last modified on 02/29/08
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