US Bridges

M-3 (gratiot) over I-94

Good

Wayne County, Michigan · In Detroit · Structure no. 000000000011245

Built
2018
7 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
236 ft
2 main spans
Daily traffic
36,180
2017 count
Owner
State
State Highway Agency

About this bridge

M-3 (gratiot) over I-94 is a prestressed concrete stringer/multi-beam or girder carrying M-3 (gratiot) over I-94 in Wayne County, Michigan. It was built in 2018, so it is 7 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 36,180 vehicles a day, roughly 3% of them trucks, projected to reach 40,176 by 2037. The structure is 236 ft (72 m) long and 129 ft wide.

Location

Open in Google Maps
CarriesM-3 (gratiot)
CrossesI-94
LocationIn Detroit
RouteState Highway 3
CountyWayne County
StateMichigan
Coordinates42.39154, -83.00627
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment7: Better than present minimum criteria
Operating rating107.1 US tons
Inventory rating94.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadGreater than HL 93
Structure length236 ft (72 m)
Longest span116 ft (35.4 m)
Deck width129 ft (39.3 m)
Roadway width90 ft (27.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic36,180 (2017)
Projected traffic40,176 by 2037
Trucks3%
Lanes on structure8
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 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-3 (gratiot) over I-94 built?

It was built in 2018, making it 7 years old in 2025.

What condition is M-3 (gratiot) over I-94 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 April 2024.

How much traffic does M-3 (gratiot) over I-94 carry?

About 36,180 vehicles per day (2017 count), of which roughly 3% are trucks.

How long is M-3 (gratiot) over I-94?

The structure is 236 ft (72 m) long with a longest span of 116 ft (35.4 m) and a deck 129 ft wide.

Who owns M-3 (gratiot) over I-94?

It is owned by the State Highway Agency.