I-75 SR 93 Improvements from N of Hernando to S of CR 470

Heavy/Civil Infrastructure, Highways & Interchanges

Design-Build

Sumter County, FL

Florida Department of Transportation

Award Winner

This project consisted of widening 13.5 miles of I-75 from a 4-lane to a 6-lane facility beginning north of the Hernando County Line and terminating south of CR 470, and the complete interchange reconstruction at SR 48 including ramp reconstruction, milling and resurfacing, and improvements at CR 476B/CR 673 interchange.

Improvements included roadway, earthwork, drainage, bridge, MSE walls, miscellaneous structures, guardrail, signing and pavement marking, signalization, Intelligent Transportation Systems (ITS) improvements, geotechnical, utilities, subsurface utility engineering, public involvement, and environmental permitting.

2017- Best in Construction – Interstate

2017 – Merit Award – Transportation Roadways

By the Numbers

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20K T
Temporary Asphalt Pavement

450K CY
Excavation

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516K CY
Embankment

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270K T
Limerock Base

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170K T
Superpave Asphalt Pavement

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275
Drainage Structures

12K FT
MSE Walls

grain

920K SY
Fine Grading & Sodding

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$75M
Project Value

Scope of Work

Widening I-75 from 4 to 6 lanes for 13 miles
Demolition of existing bridges and reconstruction of new bridges in phased construction using a temporary traffic crossover
Complete interchange reconstruction
Ramp reconstruction with milling and resurfacing
improvements at the interchange

Unique Challenges

Approved ATC eliminated guardrail in each direction and the difficult maintenance of the 1:2 side slopes
By adjusting the horizontal and vertical geometry of Ramp B, it reduced the complexity of the construction and the need to install a temporary ramp detour
Project required the utility relocations to be coordinated by the Design Build team