US Bridges

Ramp I75NB to I4WB over I-4 & Ramp I75SB to I4EB

Good

Hillsborough County, Florida · I-4 & I-75 Interchange · Structure no. 100423

Built
1984
41 years old
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
288 ft
3 main spans
Daily traffic
17,500
2023 count
Owner
State
State Highway Agency

About this bridge

Ramp I75NB to I4WB over I-4 & Ramp I75SB to I4EB is a prestressed concrete stringer/multi-beam or girder carrying Ramp I75NB to I4WB over I-4 & Ramp I75SB to I4EB 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 17,500 vehicles a day, roughly 9% of them trucks, projected to reach 21,875 by 2042. The structure is 288 ft (87.8 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesRamp I75NB to I4WB
CrossesI-4 & Ramp I75SB to I4EB
LocationI-4 & I-75 Interchange
RouteInterstate 75
StateFlorida
Coordinates28.0023, -82.32483
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 alignment8: Equal to present desirable criteria
Operating rating57.3 US tons
Inventory rating34.4 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length288 ft (87.8 m)
Longest span126 ft (38.4 m)
Deck width30 ft (9.2 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,500 (2023)
Projected traffic21,875 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 Ramp I75NB to I4WB over I-4 & Ramp I75SB to I4EB built?

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

What condition is Ramp I75NB to I4WB over I-4 & Ramp I75SB to I4EB 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 Ramp I75NB to I4WB over I-4 & Ramp I75SB to I4EB carry?

About 17,500 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is Ramp I75NB to I4WB over I-4 & Ramp I75SB to I4EB?

The structure is 288 ft (87.8 m) long with a longest span of 126 ft (38.4 m) and a deck 30 ft wide.

Who owns Ramp I75NB to I4WB over I-4 & Ramp I75SB to I4EB?

It is owned by the State Highway Agency.