US Bridges

I-75N Rmp Winchest over I-75

Good

Wayne County, Michigan · In Detroit · Structure no. 000000000011861

Built
1967
58 years old, rebuilt 2003
Condition
Good
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
230 ft
3 main spans
Daily traffic
4,408
2022 count
Owner
State
State Highway Agency

About this bridge

I-75N Rmp Winchest over I-75 is a steel stringer/multi-beam or girder carrying I-75N Rmp Winchest over I-75 in Wayne County, Michigan. It was built in 1967 and reconstructed in 2003, so it is 58 years old, older 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,408 vehicles a day, roughly 3% of them trucks. The structure is 230 ft (70.1 m) long and 34 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesI-75N Rmp Winchest
CrossesI-75
LocationIn Detroit
RouteInterstate 75
CountyWayne County
StateMichigan
Coordinates42.44439, -83.09474
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating88.6 US tons
Inventory rating53.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length230 ft (70.1 m)
Longest span82 ft (25 m)
Deck width34 ft (10.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,408 (2022)
Projected traffic—
Trucks3%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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 I-75N Rmp Winchest over I-75 built?

It was built in 1967, making it 58 years old in 2025. It was reconstructed in 2003.

What condition is I-75N Rmp Winchest over I-75 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 March 2024.

How much traffic does I-75N Rmp Winchest over I-75 carry?

About 4,408 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is I-75N Rmp Winchest over I-75?

The structure is 230 ft (70.1 m) long with a longest span of 82 ft (25 m) and a deck 34 ft wide.

Who owns I-75N Rmp Winchest over I-75?

It is owned by the State Highway Agency.