US Bridges

I-75 over Mcnichols RD

Fair

Wayne County, Michigan · In Detroit over Mcnichols · Structure no. 000000000011858

Built
1969
56 years old, rebuilt 2003
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
225 ft
4 main spans
Daily traffic
152,325
2020 count
Owner
State
State Highway Agency

About this bridge

I-75 over Mcnichols RD is a prestressed concrete stringer/multi-beam or girder carrying I-75 over Mcnichols RD in Wayne County, Michigan. It was built in 1969 and reconstructed in 2003, so it is 56 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 152,325 vehicles a day, roughly 7% of them trucks, projected to reach 161,725 by 2040. The structure is 225 ft (68.5 m) long and 149 ft wide.

Location

Open in Google Maps
CarriesI-75
CrossesMcnichols RD
LocationIn Detroit over Mcnichols
RouteInterstate 75
CountyWayne County
StateMichigan
Coordinates42.4181, -83.08763
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure8 Very GoodNo problems noted.
Last inspectionApril 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 geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.2 US tons
Inventory rating42.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length225 ft (68.5 m)
Longest span82 ft (25 m)
Deck width149 ft (45.5 m)
Roadway width143 ft (43.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic152,325 (2020)
Projected traffic161,725 by 2040
Trucks7%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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-75 over Mcnichols RD built?

It was built in 1969, making it 56 years old in 2025. It was reconstructed in 2003.

What condition is I-75 over Mcnichols RD 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 April 2023.

How much traffic does I-75 over Mcnichols RD carry?

About 152,325 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is I-75 over Mcnichols RD?

The structure is 225 ft (68.5 m) long with a longest span of 82 ft (25 m) and a deck 149 ft wide.

Who owns I-75 over Mcnichols RD?

It is owned by the State Highway Agency.