US Bridges

Davison RAMP(M-8) over I-75

Good

Wayne County, Michigan · In Detroit over I-75 Ramp · Structure no. 000000000011868

Built
1969
56 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
659 ft
6 main spans
Daily traffic
4,275
2020 count
Owner
State
State Highway Agency

About this bridge

Davison RAMP(M-8) over I-75 is a steel continuous stringer/multi-beam or girder carrying Davison RAMP(M-8) 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 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 4,275 vehicles a day, roughly 7% of them trucks, projected to reach 4,550 by 2040. The structure is 659 ft (200.9 m) long and 28 ft wide.

Location

Open in Google Maps
CarriesDavison RAMP(M-8)
CrossesI-75
LocationIn Detroit over I-75 Ramp
RouteInterstate 75
CountyWayne County
StateMichigan
Coordinates42.40854, -83.07957
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 inspectionMay 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 rating96.5 US tons
Inventory rating57.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20 + Mod
Structure length659 ft (200.9 m)
Longest span136 ft (41.4 m)
Deck width28 ft (8.6 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,275 (2020)
Projected traffic4,550 by 2040
Trucks7%
Lanes on structure1
Traffic directionOne-way traffic
CarriesThird level (interchange)
CrossesHighway
Detour if closed—
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 Davison RAMP(M-8) over I-75 built?

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

What condition is Davison RAMP(M-8) over I-75 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 May 2023.

How much traffic does Davison RAMP(M-8) over I-75 carry?

About 4,275 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is Davison RAMP(M-8) over I-75?

The structure is 659 ft (200.9 m) long with a longest span of 136 ft (41.4 m) and a deck 28 ft wide.

Who owns Davison RAMP(M-8) over I-75?

It is owned by the State Highway Agency.