US Bridges

South Blvd over I-75

Good

Oakland County, Michigan · 1.5 MI S of M-59 · Structure no. 000000000008086

Built
2001
24 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
309 ft
2 main spans
Daily traffic
14,600
2023 count
Owner
State
State Highway Agency

About this bridge

South Blvd over I-75 is a steel continuous stringer/multi-beam or girder carrying South Blvd over I-75 in Oakland County, Michigan. It was built in 2001, so it is 24 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 14,600 vehicles a day, roughly 3% of them trucks, projected to reach 15,550 by 2044. The structure is 309 ft (94.1 m) long and 71 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSouth Blvd
CrossesI-75
Location1.5 MI S of M-59
RouteCounty Highway 0
CountyOakland County
StateMichigan
Coordinates42.62033, -83.23539
Functional classUrban Minor Arterial

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.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81 US tons
Inventory rating48.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length309 ft (94.1 m)
Longest span160 ft (48.7 m)
Deck width71 ft (21.6 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,600 (2023)
Projected traffic15,550 by 2044
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

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 South Blvd over I-75 built?

It was built in 2001, making it 24 years old in 2025.

What condition is South Blvd over I-75 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 September 2024.

How much traffic does South Blvd over I-75 carry?

About 14,600 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is South Blvd over I-75?

The structure is 309 ft (94.1 m) long with a longest span of 160 ft (48.7 m) and a deck 71 ft wide.

Who owns South Blvd over I-75?

It is owned by the State Highway Agency.