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I-85 Interchange Design-Build Project Using Prefabricated Bridge Elements in West Point, GA
Bridge construction, traffic congestion, and safety were the focus of a demonstration showcase on May 1, 2008, in LaGrange, GA. Officials from GDOT and FHWA's Georgia Division and HfL team developed and implemented a technology transfer plan that included a showcase with a field demonstration on installation of the prefabricated bridge elements. The showcase agenda and speakers list are in the Appendix.
About 50 participants attended the showcase, which featured presentations by representatives of GDOT, FHWA, and the D–B contractor. GDOT Secretary of State Karen Handel discussed the project with the attendees. GDOT Commission GDOT Commissioner Gena Abraham (figure 20) and GDOT Deputy Commissioner Buddy Gratton welcomed the audience. Thomas Howell of GDOT introduced the speakers. Rodney Barry of the FHWA Georgia Division (figure 21) gave an overview of the HfL program and goals. Darryl VanMeter of GDOT provided a project description and overview on the need for the new interchange, multiple agency involvement, D–B procurement, coordination with Kia Motors, and the HfL application process GDOT (figure 22). Lamar Pruitt, also of GDOT, presented an overview of construction, covering topics related to the awarded contractor, HfL performance goals, and coordination between GDOT and the contractor (figure 23).
Brandy McDow of Arcadis explained the results of the survey conducted after 25 percent of the project was completed. Bill Holle of C.W. Matthews presented the goals and plans to safely minimize traffic congestion along I–85.
Details on the automated portable real–time speed advisory and reporting system were presented by Dr. Prahlad Pant of PDP Associates (figure 24). Pant provided an overview of the system and details of the major components. Those components range from speed and volume sensors to the dynamic message boards installed along I–85 used to provide construction zone information to the traveling public and valuable data to GDOT and the contractor to guide the timing of lane closures to minimize traffic interruptions.
John Tiernan of Arcadis presented the use of prefabricated bridge elements to achieve the goals of reducing I–85 traffic delays, increasing safety, and providing economic benefits to the contractor. He outlined construction details on the prefabricated substructure elements and connection method and gave particulars on the splicing hardware used to make the connections between elements. After the presentations, Marc Mastronardi of GDOT fielded questions.
The attendees traveled to the construction site to observe firsthand the prefabricated bridge elements being set. After the site visit, a question–and–answer panel discussion was conducted back at the showcase conference center. To close the showcase, VanMeter discussed lessons learned from the project so far and the potential for future HfL projects.
The showcase demonstrated to the attendees that this type of construction using prefabricated bridge elements was feasible and provided significant advantages in reducing total construction time and negative impacts to traffic while at the same time providing a high quality project. Observing these innovations being used successfully added confidence to other state agency and contractor attendees to try them on other projects. The showcase also reinforced with GADOT attendees the ability expand the use of these technologies.
This page last modified on 04/04/11