Client: Florida Department of Transportation District Seven
Location: Manatee and Hillsborough Counties, Florida
Construction Value: $2,300,000
Completion Date: 2011
American provided traffic projections and operational analysis for this project. A traffic study was also performed on three interchanges along I-75 using CORSIM. American completed a Project Development and Environment (PD&E) study for 25 miles on I-75. This corridor includes existing interchanges at SR 674, Big Bend Road and Gibsonton Road.
American evaluated the expansion of the existing six-lane interstate with ultimate improvement alternatives including the addition of general use lanes as well as the use of managed lanes that could serve HOV traffic, express/local bus traffic or be price-managed using tolls. Through extensive traffic analyses as well as environmental impact analyses, public involvement efforts, and coordination with local agencies, the ultimate preferred alternative included the addition of four managed lanes within the existing median of I-75 to reduce potential impacts and right-of-way costs. In addition to evaluating alternatives to meet the 20-30 year traffic demand, American was also involved in developing a long-term (50+ year) vision for the corridor for accommodating different transportation modes (vehicles, light rail, heavy rail, bus) as well as studying possible interim improvements at the three interchanges within the study area. These interim improvements include interchange ramp modifications and/or realignments that help meet the short-term traffic demand and were developed to be compatible with the ultimate improvements to reduce throwaway costs.
The project also involved 26 bridge structures, assessment of 40 drainage basins including some within conservation/Section 4(f) lands, coast guard navigation reviews, and the evaluation of noise, wetlands, protected species and essential fish habitat.