US Bridges

M-102 8 Mile RD over I-75

Fair

Wayne County, Michigan · In Detroit over I-75 Serv · Structure no. 000000000011850

Built
1969
56 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,068 ft
11 main spans
Daily traffic
64,600
2022 count
Owner
State
State Highway Agency

About this bridge

M-102 8 Mile RD over I-75 is a steel continuous stringer/multi-beam or girder carrying M-102 8 Mile RD over I-75 in Wayne County, Michigan. It was built in 1969, so it is 56 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. Its operating status is: open, would be posted or closed except for temporary shoring.

It carries about 64,600 vehicles a day, roughly 3% of them trucks, projected to reach 68,600 by 2042. The structure is 1,068 ft (325.6 m) long and 93 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesM-102 8 Mile RD
CrossesI-75
LocationIn Detroit over I-75 Serv
RouteState Highway 102
CountyWayne County
StateMichigan
Coordinates42.44681, -83.09435
Functional classUrban Other Principal Arterial

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, would be posted or closed except for temporary shoring
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73.2 US tons
Inventory rating44 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans11
Design loadHS 20
Structure length1,068 ft (325.6 m)
Longest span135 ft (41.1 m)
Deck width93 ft (28.2 m)
Roadway width82 ft (25 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic64,600 (2022)
Projected traffic68,600 by 2042
Trucks3%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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 proposedDeck replacement with only incidental widening
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was M-102 8 Mile RD over I-75 built?

It was built in 1969, making it 56 years old in 2025.

What condition is M-102 8 Mile RD over I-75 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 M-102 8 Mile RD over I-75 carry?

About 64,600 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is M-102 8 Mile RD over I-75?

The structure is 1,068 ft (325.6 m) long with a longest span of 135 ft (41.1 m) and a deck 93 ft wide.

Who owns M-102 8 Mile RD over I-75?

It is owned by the State Highway Agency.