US Bridges

I-75 Exp NB 39.2 over I-75 Sb/Turnpike Heft SB

Good

Miami-Dade County, Florida · Tpk Heft to I-75 Exprs · Structure no. 870916

Built
2017
8 years old
Condition
Good
inspected December 2023
Type
Box Beam or Girders - Multiple
Steel Continuous
Length
1,492 ft
7 main spans
Daily traffic
5,600
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

I-75 Exp NB 39.2 over I-75 Sb/Turnpike Heft SB is a steel continuous box beam or girders - multiple carrying I-75 Exp NB 39.2 over I-75 Sb/Turnpike Heft SB in Miami-Dade County, Florida. It was built in 2017, so it is 8 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 5,600 vehicles a day, roughly 6% of them trucks, projected to reach 9,716 by 2042. The structure is 1,492 ft (454.8 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-75 Exp NB 39.2
CrossesI-75 Sb/Turnpike Heft SB
LocationTpk Heft to I-75 Exprs
RouteInterstate 75
CountyMiami-Dade County
StateFlorida
Coordinates25.94938, -80.35186
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure9 ExcellentNo problems noted.
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 rating47.5 US tons
Inventory rating36.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadHL 93
Structure length1,492 ft (454.8 m)
Longest span250 ft (76.2 m)
Deck width30 ft (9.1 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic5,600 (2023)
Projected traffic9,716 by 2042
Trucks6%
Lanes on structure1
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a toll road
National Highway SystemYes

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
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 Exp NB 39.2 over I-75 Sb/Turnpike Heft SB built?

It was built in 2017, making it 8 years old in 2025.

What condition is I-75 Exp NB 39.2 over I-75 Sb/Turnpike Heft SB 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 Exp NB 39.2 over I-75 Sb/Turnpike Heft SB carry?

About 5,600 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is I-75 Exp NB 39.2 over I-75 Sb/Turnpike Heft SB?

The structure is 1,492 ft (454.8 m) long with a longest span of 250 ft (76.2 m) and a deck 30 ft wide.

Who owns I-75 Exp NB 39.2 over I-75 Sb/Turnpike Heft SB?

It is owned by the State Toll Authority.