US Bridges

N Service RD over I-75 Ramp to WB M-8

Fair

Wayne County, Michigan · In Detroit M-8 WB Ramp · Structure no. 000000000011378

Built
1971
54 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
122 ft
1 main span
Daily traffic
3,180
1982 count
Owner
State
State Highway Agency

About this bridge

N Service RD over I-75 Ramp to WB M-8 is a steel stringer/multi-beam or girder carrying N Service RD over I-75 Ramp to WB M-8 in Wayne County, Michigan. It was built in 1971, 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 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 3,180 vehicles a day, roughly 5% of them trucks, projected to reach 3,657 by 2002. The structure is 122 ft (37.2 m) long and 38 ft wide.

Location

Open in Google Maps
CarriesN Service RD
CrossesI-75 Ramp to WB M-8
LocationIn Detroit M-8 WB Ramp
RouteState Highway 8
CountyWayne County
StateMichigan
Coordinates42.40824, -83.08349
Functional classUrban Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating100.8 US tons
Inventory rating60.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length122 ft (37.2 m)
Longest span122 ft (37.2 m)
Deck width38 ft (11.7 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,180 (1982)
Projected traffic3,657 by 2002
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemNo

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 N Service RD over I-75 Ramp to WB M-8 built?

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

What condition is N Service RD over I-75 Ramp to WB M-8 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 October 2023.

How much traffic does N Service RD over I-75 Ramp to WB M-8 carry?

About 3,180 vehicles per day (1982 count), of which roughly 5% are trucks.

How long is N Service RD over I-75 Ramp to WB M-8?

The structure is 122 ft (37.2 m) long with a longest span of 122 ft (37.2 m) and a deck 38 ft wide.

Who owns N Service RD over I-75 Ramp to WB M-8?

It is owned by the State Highway Agency.