US Bridges

M-3 WB Conn over I-375 & I-75 Ramp

Fair

Wayne County, Michigan · In Detroit over I-375 NW · Structure no. 000000000011811

Built
1964
61 years old, rebuilt 1998
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
39 ft
1 main span
Daily traffic
22,748
2007 count
Owner
State
State Highway Agency

About this bridge

M-3 WB Conn over I-375 & I-75 Ramp is a steel stringer/multi-beam or girder carrying M-3 WB Conn over I-375 & I-75 Ramp in Wayne County, Michigan. It was built in 1964 and reconstructed in 1998, 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 22,748 vehicles a day, projected to reach 14,803 by 2018. The structure is 39 ft (11.8 m) long and 45 ft wide.

Location

Open in Google Maps
CarriesM-3 WB Conn
CrossesI-375 & I-75 Ramp
LocationIn Detroit over I-375 NW
RouteState Highway 3
CountyWayne County
StateMichigan
Coordinates42.34414, -83.04222
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
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 rating107.1 US tons
Inventory rating87.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length39 ft (11.8 m)
Longest span39 ft (11.8 m)
Deck width45 ft (13.7 m)
Roadway width41 ft (12.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,748 (2007)
Projected traffic14,803 by 2018
Trucks0%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
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 WB Conn over I-375 & I-75 Ramp built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 1998.

What condition is M-3 WB Conn over I-375 & I-75 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 March 2024.

How much traffic does M-3 WB Conn over I-375 & I-75 Ramp carry?

About 22,748 vehicles per day (2007 count).

How long is M-3 WB Conn over I-375 & I-75 Ramp?

The structure is 39 ft (11.8 m) long with a longest span of 39 ft (11.8 m) and a deck 45 ft wide.

Who owns M-3 WB Conn over I-375 & I-75 Ramp?

It is owned by the State Highway Agency.