US Bridges

I-75NB to US-301NB over US-301/SR-43

Good

Hillsborough County, Florida · 2MI South of SR-618 · Structure no. 100484

Built
1984
41 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
320 ft
4 main spans
Daily traffic
5,800
2023 count
Owner
State
State Highway Agency

About this bridge

I-75NB to US-301NB over US-301/SR-43 is a prestressed concrete stringer/multi-beam or girder carrying I-75NB to US-301NB over US-301/SR-43 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 5,800 vehicles a day, roughly 9% of them trucks, projected to reach 10,063 by 2042. The structure is 320 ft (97.5 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI-75NB to US-301NB
CrossesUS-301/SR-43
Location2MI South of SR-618
RouteInterstate 75
StateFlorida
Coordinates27.90274, -82.34346
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.
Substructure8 Very GoodNo problems noted.
Last inspectionOctober 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 rating77.1 US tons
Inventory rating64 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length320 ft (97.5 m)
Longest span114 ft (34.8 m)
Deck width30 ft (9.1 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,800 (2023)
Projected traffic10,063 by 2042
Trucks9%
Lanes on structure1
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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-75NB to US-301NB over US-301/SR-43 built?

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

What condition is I-75NB to US-301NB over US-301/SR-43 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 October 2023.

How much traffic does I-75NB to US-301NB over US-301/SR-43 carry?

About 5,800 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is I-75NB to US-301NB over US-301/SR-43?

The structure is 320 ft (97.5 m) long with a longest span of 114 ft (34.8 m) and a deck 30 ft wide.

Who owns I-75NB to US-301NB over US-301/SR-43?

It is owned by the State Highway Agency.