I-75 (SR 93) From S. Of US 98/Cortez To N. Of US 98/SR 50 To Sumter
This I-75 project’s scope consisted of roadway widening and reconstruction to a 6-lane roadway, providing for a future 8 to 10-lane typical section. Also included was widening and reconstructing a section of SR 50 to a 6-lane urban typical section, with accommodations for a future 8-lane section.
Dual left turns were introduced on the entrance to SR 50 for a Single Point Urban Interchange (SPUI) configuration. Median openings and left turn lanes were provided intermittently along the SR 50 corridor.
Middlesex was also responsible for replacing 2 I-75 bridges over SR 50 and the widening 4 NB and SB bridges over Croom Rital Road and Withlacoochee River.
2020 – Outstanding Major Project
By the Numbers
5.5K psi
Concrete (Enhancing Bridge Durability)
2
Bridge Reconstruction
4
Bridge Widening
$97M
Project Value
Scope of Work
- I-75 and SR 50 widening and interchange reconstruction
- 2 bridge constructions, each with a 298.5 FT clear span
- 4 existing bridge widenings
- SB bridge widening and diversion to accommodate shifting traffic for demolition and construction of new NB bridge
- Lowering of Croom Rital Road to increase I-75 current bridge vertical clearance
- Single Point Urban Interchange (SPUI) construction
- Right of Way fence, guardrail removal and resetting
- Concrete pavement construction
- Milling and resurfacing
- ITS, traffic signals, signage, interchange lighting
- MSE walls acting as temporary critical walls
- Pedestrian and bicycle improvements
- Drainage of concrete box culvert extensions
- Storm drainage, utilities, earthwork
- Pond excavation
Unique Challenges
- Unique placement of concrete pavement on SR 50 while maintaining traffic
- Balancing lane/road closures on SR 50 to minimize impact to the traveling public while still allowing efficient bridge construction
- Coordinating work over the Withlacoochee State Trail and River
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