US Bridges

M-5 SB Mainline over 12 Mile Road

Fair

Oakland County, Michigan · I-96 I-696 M-5 Intrchg · Structure no. 000000000008134

Built
1993
32 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
209 ft
2 main spans
Daily traffic
35,541
2007 count
Owner
State
State Highway Agency

About this bridge

M-5 SB Mainline over 12 Mile Road is a prestressed concrete stringer/multi-beam or girder carrying M-5 SB Mainline over 12 Mile Road in Oakland County, Michigan. It was built in 1993, so it is 32 years old, younger 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 35,541 vehicles a day, roughly 1% of them trucks, projected to reach 21,885 by 2018. The structure is 209 ft (63.6 m) long and 63 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesM-5 SB Mainline
Crosses12 Mile Road
LocationI-96 I-696 M-5 Intrchg
RouteState Highway 5
CountyOakland County
StateMichigan
Coordinates42.49667, -83.44669
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80 US tons
Inventory rating35.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length209 ft (63.6 m)
Longest span99 ft (30.3 m)
Deck width63 ft (19.3 m)
Roadway width60 ft (18.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35,541 (2007)
Projected traffic21,885 by 2018
Trucks1%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
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 M-5 SB Mainline over 12 Mile Road built?

It was built in 1993, making it 32 years old in 2025.

What condition is M-5 SB Mainline over 12 Mile Road 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 March 2023.

How much traffic does M-5 SB Mainline over 12 Mile Road carry?

About 35,541 vehicles per day (2007 count), of which roughly 1% are trucks.

How long is M-5 SB Mainline over 12 Mile Road?

The structure is 209 ft (63.6 m) long with a longest span of 99 ft (30.3 m) and a deck 63 ft wide.

Who owns M-5 SB Mainline over 12 Mile Road?

It is owned by the State Highway Agency.