Crosstown Parkway Extension

RS&H was part of the design-build team that completed the Crosstown Parkway Extension in Port St. Lucie, Florida. The project creates a third crossing into Port St. Lucie, relieves traffic congestion, and provides an additional hurricane evacuation route. The corridor included approximately 1.5 miles of roadway improvements and a 0.75-mile bridge over the North Fork of the St. Lucie River. The bridge traverses a highly environmentally sensitive area, which required minimization of wetland impacts and protection of the Savannas Preserve State Park. This project features unique architecture for the city’s signature bridge, drainage design, utility coordination and design, and extensive landscaping.

A unique feature of this project is the superstreet intersection at Crosstown Parkway and Floresta Drive, the first of its kind in Florida. This innovative intersection is a type of restricted crossing u-turn intersection (defined by the Federal Highway Administration) specifically designed for situations where through traffic on the major road is significantly heavier than the traffic of the cross street. Superstreets have been used successfully in many other states, improving traffic flow and safety. Travelers on Crosstown Parkway treat the intersection the same as any traditional signalized intersection, able to travel through, turn left, or turn right. Those of Floresta Drive are only able to turn right at the intersection. They will then go through signalized, synchronized u-turns in order to travel through the intersection or to turn left.

The intersection eliminates a signal phase, resulting in significant time savings for motorists. Traffic analysis for Crosstown Parkway and Floresta Drive indicated the average delay time was eight times faster and the level of service is improved by three levels both in the opening year (D to A) and design year (F to C) when compared to a traditional four-leg intersection. Safety is also greatly improved by reducing the conflict points from 32 to 14, reducing the frequency and severity of crashes. Pedestrian safety was improved even more than vehicular safety, with conflict points reduced from 24 to eight, and a large median refuge island.

Project Details

Description Transportation Design-Build Contractors-Transportation Visualization
Location Port St. Lucie, FL
Client/Owner Archer Western/City of Port St. Lucie/Florida Department of Transportation
Awards Grand Award – Structural Systems Category, ACEC Florida, 2022

Project of the Year – Structural Systems Category, More than $5 Million Division, APWA Florida, 2021

National Award of Excellence, Transportation Category, DBIA 2021

Outstanding Design-Build Project, ACEC-FL/FDOT, 2021

Merit Award, Transportation Category, DBIA, 2021

Best of the Best, Highway/Bridge Category, ENR, 2020

Project of the Year – Transportation-Structures Category, DBIA Florida Region, 2020

No. 8 of Top 10 Bridges, Roads & Bridges, 2020

Best Highway/Bridge Project, ENR Southeast, 2020

Best in Construction – Local Agency Project (LAP), FTBA, 2020


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