US Bridges

I-275 SB over Northline RD

Fair

Wayne County, Michigan · In Romulus · Structure no. 000000000011904

Built
1974
51 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
210 ft
3 main spans
Daily traffic
35,403
2007 count
Owner
State
State Highway Agency

About this bridge

I-275 SB over Northline RD is a steel stringer/multi-beam or girder carrying I-275 SB over Northline RD in Wayne County, Michigan. It was built in 1974, so it is 51 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 6 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 35,403 vehicles a day, roughly 9% of them trucks, projected to reach 37,380 by 2018. The structure is 210 ft (64 m) long and 63 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-275 SB
CrossesNorthline RD
LocationIn Romulus
RouteInterstate 275
CountyWayne County
StateMichigan
Coordinates42.20873, -83.39314
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83.2 US tons
Inventory rating48.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length210 ft (64 m)
Longest span106 ft (32.2 m)
Deck width63 ft (19.1 m)
Roadway width59 ft (18 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35,403 (2007)
Projected traffic37,380 by 2018
Trucks9%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
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-275 SB over Northline RD built?

It was built in 1974, making it 51 years old in 2025.

What condition is I-275 SB over Northline 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 September 2023.

How much traffic does I-275 SB over Northline RD carry?

About 35,403 vehicles per day (2007 count), of which roughly 9% are trucks.

How long is I-275 SB over Northline RD?

The structure is 210 ft (64 m) long with a longest span of 106 ft (32.2 m) and a deck 63 ft wide.

Who owns I-275 SB over Northline RD?

It is owned by the State Highway Agency.