US Bridges

US-24 over I-75 SB

Good

Oakland County, Michigan · @ US-24 · Structure no. 000000000008032

Built
2004
21 years old
Condition
Good
inspected December 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
184 ft
3 main spans
Daily traffic
26,557
2007 count
Owner
State
State Highway Agency

About this bridge

US-24 over I-75 SB is a prestressed concrete box beam or girders - multiple carrying US-24 over I-75 SB in Oakland County, Michigan. It was built in 2004, so it is 21 years old, younger than the Michigan average of 48.3 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 26,557 vehicles a day, roughly 4% of them trucks, projected to reach 39,813 by 2018. The structure is 184 ft (56.1 m) long and 87 ft wide.

CarriesUS-24
CrossesI-75 SB
Location@ US-24
RouteU.S. Route 24
Coordinates42.73896, -83.45161
Functional classUrban Other Principal Arterial

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.
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 geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating65 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length184 ft (56.1 m)
Longest span73 ft (22.1 m)
Deck width87 ft (26.6 m)
Roadway width84 ft (25.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,557 (2007)
Projected traffic39,813 by 2018
Trucks4%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 US-24 over I-75 SB built?

It was built in 2004, making it 21 years old in 2025.

What condition is US-24 over I-75 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 2024.

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

About 26,557 vehicles per day (2007 count), of which roughly 4% are trucks.

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

The structure is 184 ft (56.1 m) long with a longest span of 73 ft (22.1 m) and a deck 87 ft wide.

Who owns US-24 over I-75 SB?

It is owned by the State Highway Agency.