US Bridges

I-75 NB over US-24

Fair

Oakland County, Michigan · @ US-24 · Structure no. 000000000008033

Built
1962
63 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
197 ft
3 main spans
Daily traffic
28,261
2007 count
Owner
State
State Highway Agency

About this bridge

I-75 NB over US-24 is a steel stringer/multi-beam or girder carrying I-75 NB over US-24 in Oakland County, Michigan. It was built in 1962, so it is 63 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 28,261 vehicles a day, roughly 10% of them trucks, projected to reach 27,609 by 2018. The structure is 197 ft (59.9 m) long and 65 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-75 NB
CrossesUS-24
Location@ US-24
RouteInterstate 75
CountyOakland County
StateMichigan
Coordinates42.74051, -83.45364
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating88.2 US tons
Inventory rating52.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length197 ft (59.9 m)
Longest span107 ft (32.6 m)
Deck width65 ft (19.9 m)
Roadway width62 ft (18.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28,261 (2007)
Projected traffic27,609 by 2018
Trucks10%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 proposedDeck replacement with only incidental widening
Estimated improvement cost$161,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-75 NB over US-24 built?

It was built in 1962, making it 63 years old in 2025.

What condition is I-75 NB over US-24 in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in December 2024.

How much traffic does I-75 NB over US-24 carry?

About 28,261 vehicles per day (2007 count), of which roughly 10% are trucks.

How long is I-75 NB over US-24?

The structure is 197 ft (59.9 m) long with a longest span of 107 ft (32.6 m) and a deck 65 ft wide.

Who owns I-75 NB over US-24?

It is owned by the State Highway Agency.