US Bridges

US-12 (michigan Av over I-94 Ramp

Fair

Wayne County, Michigan · In Dearborn · Structure no. 000000000011139

Built
1944
81 years old, rebuilt 1968
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
50 ft
1 main span
Daily traffic
28,335
2007 count
Owner
State
State Highway Agency

About this bridge

US-12 (michigan Av over I-94 Ramp is a steel stringer/multi-beam or girder carrying US-12 (michigan Av over I-94 Ramp in Wayne County, Michigan. It was built in 1944 and reconstructed in 1968, so it is 81 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 5 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 28,335 vehicles a day, roughly 5% of them trucks, projected to reach 31,582 by 2018. The structure is 50 ft (15.2 m) long and 118 ft wide.

Location

Open in Google Maps
CarriesUS-12 (michigan Av
CrossesI-94 Ramp
LocationIn Dearborn
RouteU.S. Route 12
CountyWayne County
StateMichigan
Coordinates42.32624, -83.16191
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment7: Better than present minimum criteria
Operating rating68.6 US tons
Inventory rating41.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length50 ft (15.2 m)
Longest span50 ft (15.2 m)
Deck width118 ft (35.9 m)
Roadway width90 ft (27.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28,335 (2007)
Projected traffic31,582 by 2018
Trucks5%
Lanes on structure9
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedDeck replacement with only incidental widening
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US-12 (michigan Av over I-94 Ramp built?

It was built in 1944, making it 81 years old in 2025. It was reconstructed in 1968.

What condition is US-12 (michigan Av over I-94 Ramp 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 September 2023.

How much traffic does US-12 (michigan Av over I-94 Ramp carry?

About 28,335 vehicles per day (2007 count), of which roughly 5% are trucks.

How long is US-12 (michigan Av over I-94 Ramp?

The structure is 50 ft (15.2 m) long with a longest span of 50 ft (15.2 m) and a deck 118 ft wide.

Who owns US-12 (michigan Av over I-94 Ramp?

It is owned by the State Highway Agency.