US Bridges

I-4 EB to I-75NB over I-4

Good

Hillsborough County, Florida · I-4 & I-75 Interchange · Structure no. 100428

Built
1984
41 years old
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
318 ft
3 main spans
Daily traffic
12,500
2023 count
Owner
State
State Highway Agency

About this bridge

I-4 EB to I-75NB over I-4 is a steel continuous stringer/multi-beam or girder carrying I-4 EB to I-75NB over I-4 in Hillsborough County, Florida. It was built in 1984, so it is 41 years old, younger 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 12,500 vehicles a day, roughly 9% of them trucks, projected to reach 15,625 by 2042. The structure is 318 ft (96.8 m) long and 31 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesI-4 EB to I-75NB
CrossesI-4
LocationI-4 & I-75 Interchange
RouteInterstate 75
CountyHillsborough County
StateFlorida
Coordinates28.00222, -82.32589
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 geometry9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating50 US tons
Inventory rating38.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length318 ft (96.8 m)
Longest span155 ft (47.2 m)
Deck width31 ft (9.5 m)
Roadway width27 ft (8.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,500 (2023)
Projected traffic15,625 by 2042
Trucks9%
Lanes on structure1
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkSTRAHNET connector

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-4 EB to I-75NB over I-4 built?

It was built in 1984, making it 41 years old in 2025.

What condition is I-4 EB to I-75NB over I-4 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-4 EB to I-75NB over I-4 carry?

About 12,500 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is I-4 EB to I-75NB over I-4?

The structure is 318 ft (96.8 m) long with a longest span of 155 ft (47.2 m) and a deck 31 ft wide.

Who owns I-4 EB to I-75NB over I-4?

It is owned by the State Highway Agency.