US Bridges

I-4WB to Dwntn Rmp over I275 SB to Downtown Ramp

Good

Hillsborough County, Florida · I-4 & I-275 Interchange · Structure no. 100653

Built
2005
20 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
195 ft
1 main span
Daily traffic
6,700
2024 count
Owner
State
State Highway Agency

About this bridge

I-4WB to Dwntn Rmp over I275 SB to Downtown Ramp is a steel stringer/multi-beam or girder carrying I-4WB to Dwntn Rmp over I275 SB to Downtown Ramp in Hillsborough County, Florida. It was built in 2005, so it is 20 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 6,700 vehicles a day, roughly 9% of them trucks, projected to reach 8,375 by 2044. The structure is 195 ft (59.3 m) long and 36 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesI-4WB to Dwntn Rmp
CrossesI275 SB to Downtown Ramp
LocationI-4 & I-275 Interchange
RouteInterstate 4
CountyHillsborough County
StateFlorida
Coordinates27.96413, -82.4535
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionJuly 2024
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 rating51.8 US tons
Inventory rating34.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length195 ft (59.3 m)
Longest span195 ft (59.3 m)
Deck width36 ft (10.9 m)
Roadway width33 ft (10 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,700 (2024)
Projected traffic8,375 by 2044
Trucks9%
Lanes on structure1
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed3.7 mi (6 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-4WB to Dwntn Rmp over I275 SB to Downtown Ramp built?

It was built in 2005, making it 20 years old in 2025.

What condition is I-4WB to Dwntn Rmp over I275 SB to Downtown Ramp 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 July 2024.

How much traffic does I-4WB to Dwntn Rmp over I275 SB to Downtown Ramp carry?

About 6,700 vehicles per day (2024 count), of which roughly 9% are trucks.

How long is I-4WB to Dwntn Rmp over I275 SB to Downtown Ramp?

The structure is 195 ft (59.3 m) long with a longest span of 195 ft (59.3 m) and a deck 36 ft wide.

Who owns I-4WB to Dwntn Rmp over I275 SB to Downtown Ramp?

It is owned by the State Highway Agency.