US Bridges

I-75 NB Off Ramp over RR and Maint RD

Fair

Wayne County, Michigan · In Detroit · Structure no. 000000000011717

Built
1967
58 years old, rebuilt 2018
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
533 ft
12 main spans
Daily traffic
103,925
2014 count
Owner
State
State Highway Agency

About this bridge

I-75 NB Off Ramp over RR and Maint RD is a steel stringer/multi-beam or girder carrying I-75 NB Off Ramp over RR and Maint RD in Wayne County, Michigan. It was built in 1967 and reconstructed in 2018, 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 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 103,925 vehicles a day, roughly 12% of them trucks, projected to reach 116,550 by 2037. The structure is 533 ft (162.5 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesI-75 NB Off Ramp
CrossesRR and Maint RD
LocationIn Detroit
RouteInterstate 75
CountyWayne County
StateMichigan
Coordinates42.2904, -83.13047
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
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 geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating96.8 US tons
Inventory rating57.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans12
Design loadHS 20 + Mod
Structure length533 ft (162.5 m)
Longest span83 ft (25.3 m)
Deck width28 ft (8.6 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic103,925 (2014)
Projected traffic116,550 by 2037
Trucks12%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed3.7 mi (6 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-75 NB Off Ramp over RR and Maint RD built?

It was built in 1967, making it 58 years old in 2025. It was reconstructed in 2018.

What condition is I-75 NB Off Ramp over RR and Maint 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 May 2024.

How much traffic does I-75 NB Off Ramp over RR and Maint RD carry?

About 103,925 vehicles per day (2014 count), of which roughly 12% are trucks.

How long is I-75 NB Off Ramp over RR and Maint RD?

The structure is 533 ft (162.5 m) long with a longest span of 83 ft (25.3 m) and a deck 28 ft wide.

Who owns I-75 NB Off Ramp over RR and Maint RD?

It is owned by the State Highway Agency.