US Bridges

I-275 Ramp N over CSX RR

Good

Wayne County, Michigan · S of Schoolcraft · Structure no. 000000000011963

Built
1971
54 years old, rebuilt 2001
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
323 ft
5 main spans
Daily traffic
8,760
1982 count
Owner
State
State Highway Agency

About this bridge

I-275 Ramp N over CSX RR is a steel stringer/multi-beam or girder carrying I-275 Ramp N over CSX RR in Wayne County, Michigan. It was built in 1971 and reconstructed in 2001, so it is 54 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 8,760 vehicles a day, projected to reach 8,760 by 1977. The structure is 323 ft (98.4 m) long and 32 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-275 Ramp N
CrossesCSX RR
LocationS of Schoolcraft
RouteInterstate 275
CountyWayne County
StateMichigan
Coordinates42.38076, -83.43636
Functional classUrban Principal Arterial - Interstate

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 inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating83.9 US tons
Inventory rating50.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length323 ft (98.4 m)
Longest span78 ft (23.7 m)
Deck width32 ft (9.8 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,760 (1982)
Projected traffic8,760 by 1977
Trucks—
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.2 mi (2 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-275 Ramp N over CSX RR built?

It was built in 1971, making it 54 years old in 2025. It was reconstructed in 2001.

What condition is I-275 Ramp N over CSX RR 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 October 2023.

How much traffic does I-275 Ramp N over CSX RR carry?

About 8,760 vehicles per day (1982 count).

How long is I-275 Ramp N over CSX RR?

The structure is 323 ft (98.4 m) long with a longest span of 78 ft (23.7 m) and a deck 32 ft wide.

Who owns I-275 Ramp N over CSX RR?

It is owned by the State Highway Agency.