US Bridges

I-75 SB over Sligh Ave & Ramp D-1

Good

Hillsborough County, Florida · 0.2MI North of I-4 · Structure no. 100397

Built
1984
41 years old, rebuilt 2004
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
325 ft
4 main spans
Daily traffic
78,250
2023 count
Owner
State
State Highway Agency

About this bridge

I-75 SB over Sligh Ave & Ramp D-1 is a prestressed concrete stringer/multi-beam or girder carrying I-75 SB over Sligh Ave & Ramp D-1 in Hillsborough County, Florida. It was built in 1984 and reconstructed in 2004, 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 78,250 vehicles a day, roughly 14% of them trucks, projected to reach 135,764 by 2042. The structure is 325 ft (99 m) long and 60 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesI-75 SB
CrossesSligh Ave & Ramp D-1
Location0.2MI North of I-4
RouteInterstate 75
CountyHillsborough County
StateFlorida
Coordinates28.00584, -82.32771
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating86.4 US tons
Inventory rating51.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length325 ft (99 m)
Longest span107 ft (32.7 m)
Deck width60 ft (18.4 m)
Roadway width57 ft (17.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic78,250 (2023)
Projected traffic135,764 by 2042
Trucks14%
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 SB over Sligh Ave & Ramp D-1 built?

It was built in 1984, making it 41 years old in 2025. It was reconstructed in 2004.

What condition is I-75 SB over Sligh Ave & Ramp D-1 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 SB over Sligh Ave & Ramp D-1 carry?

About 78,250 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is I-75 SB over Sligh Ave & Ramp D-1?

The structure is 325 ft (99 m) long with a longest span of 107 ft (32.7 m) and a deck 60 ft wide.

Who owns I-75 SB over Sligh Ave & Ramp D-1?

It is owned by the State Highway Agency.