US Bridges

I-75 NB (SR-93A) over I-4 EB to I-75 NB

Good

Hillsborough County, Florida · I-4 & I-75 Interchange · Structure no. 100417

Built
1983
42 years old, rebuilt 2004
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
167 ft
3 main spans
Daily traffic
83,500
2023 count
Owner
State
State Highway Agency

About this bridge

I-75 NB (SR-93A) over I-4 EB to I-75 NB is a prestressed concrete stringer/multi-beam or girder carrying I-75 NB (SR-93A) over I-4 EB to I-75 NB in Hillsborough County, Florida. It was built in 1983 and reconstructed in 2004, so it is 42 years old, older than the Florida average of 41.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 83,500 vehicles a day, roughly 11% of them trucks, projected to reach 104,375 by 2042. The structure is 167 ft (50.9 m) long and 59 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesI-75 NB (SR-93A)
CrossesI-4 EB to I-75 NB
LocationI-4 & I-75 Interchange
RouteInterstate 75
CountyHillsborough County
StateFlorida
Coordinates27.99985, -82.32669
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64 US tons
Inventory rating57 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length167 ft (50.9 m)
Longest span94 ft (28.6 m)
Deck width59 ft (18 m)
Roadway width56 ft (17 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic83,500 (2023)
Projected traffic104,375 by 2042
Trucks11%
Lanes on structure3
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-75 NB (SR-93A) over I-4 EB to I-75 NB built?

It was built in 1983, making it 42 years old in 2025. It was reconstructed in 2004.

What condition is I-75 NB (SR-93A) over I-4 EB to I-75 NB in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2023.

How much traffic does I-75 NB (SR-93A) over I-4 EB to I-75 NB carry?

About 83,500 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is I-75 NB (SR-93A) over I-4 EB to I-75 NB?

The structure is 167 ft (50.9 m) long with a longest span of 94 ft (28.6 m) and a deck 59 ft wide.

Who owns I-75 NB (SR-93A) over I-4 EB to I-75 NB?

It is owned by the State Highway Agency.