US Bridges

I-75 NB over Old M-59 (auburn Rd)

Fair

Oakland County, Michigan · 0.5 MI S of M-59 · Structure no. 000000000008087

Built
1964
61 years old, rebuilt 2001
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
133 ft
3 main spans
Daily traffic
70,877
2007 count
Owner
State
State Highway Agency

About this bridge

I-75 NB over Old M-59 (auburn Rd) is a prestressed concrete stringer/multi-beam or girder carrying I-75 NB over Old M-59 (auburn Rd) in Oakland County, Michigan. It was built in 1964 and reconstructed in 2001, so it is 61 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 70,877 vehicles a day, roughly 6% of them trucks, projected to reach 72,975 by 2018. The structure is 133 ft (40.5 m) long and 98 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-75 NB
CrossesOld M-59 (auburn Rd)
Location0.5 MI S of M-59
RouteInterstate 75
CountyOakland County
StateMichigan
Coordinates42.63452, -83.23847
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 inspectionJuly 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 alignment8: Equal to present desirable criteria
Operating rating68.2 US tons
Inventory rating40.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length133 ft (40.5 m)
Longest span63 ft (19.1 m)
Deck width98 ft (30 m)
Roadway width95 ft (29 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic70,877 (2007)
Projected traffic72,975 by 2018
Trucks6%
Lanes on structure5
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-75 NB over Old M-59 (auburn Rd) built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 2001.

What condition is I-75 NB over Old M-59 (auburn Rd) 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 July 2023.

How much traffic does I-75 NB over Old M-59 (auburn Rd) carry?

About 70,877 vehicles per day (2007 count), of which roughly 6% are trucks.

How long is I-75 NB over Old M-59 (auburn Rd)?

The structure is 133 ft (40.5 m) long with a longest span of 63 ft (19.1 m) and a deck 98 ft wide.

Who owns I-75 NB over Old M-59 (auburn Rd)?

It is owned by the State Highway Agency.