US Bridges

I-75 N to I-375 N over I-375

Fair

Wayne County, Michigan · In Detroit over I-375 · Structure no. 000000000011801

Built
1964
61 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
398 ft
5 main spans
Daily traffic
43,796
2007 count
Owner
State
State Highway Agency

About this bridge

I-75 N to I-375 N over I-375 is a steel stringer/multi-beam or girder carrying I-75 N to I-375 N over I-375 in Wayne County, Michigan. It was built in 1964, 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 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 43,796 vehicles a day, roughly 15% of them trucks, projected to reach 39,301 by 2018. The structure is 398 ft (121.3 m) long and 38 ft wide.

Location

Open in Google Maps
CarriesI-75 N to I-375 N
CrossesI-375
LocationIn Detroit over I-375
RouteInterstate 75
CountyWayne County
StateMichigan
Coordinates42.34234, -83.04338
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
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 rating67.1 US tons
Inventory rating40.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length398 ft (121.3 m)
Longest span119 ft (36.2 m)
Deck width38 ft (11.7 m)
Roadway width34 ft (10.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic43,796 (2007)
Projected traffic39,301 by 2018
Trucks15%
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 I-75 N to I-375 N over I-375 built?

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

What condition is I-75 N to I-375 N over I-375 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 I-75 N to I-375 N over I-375 carry?

About 43,796 vehicles per day (2007 count), of which roughly 15% are trucks.

How long is I-75 N to I-375 N over I-375?

The structure is 398 ft (121.3 m) long with a longest span of 119 ft (36.2 m) and a deck 38 ft wide.

Who owns I-75 N to I-375 N over I-375?

It is owned by the State Highway Agency.