US Bridges

M-10 (ramp B) over M-10 Ramp

Fair

Oakland County, Michigan · In Southfield (ramp A) · Structure no. 000000000007874

Built
1964
61 years old, rebuilt 2006
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
194 ft
3 main spans
Daily traffic
67,700
1987 count
Owner
State
State Highway Agency

About this bridge

M-10 (ramp B) over M-10 Ramp is a steel stringer/multi-beam or girder carrying M-10 (ramp B) over M-10 Ramp in Oakland County, Michigan. It was built in 1964 and reconstructed in 2006, so it is 61 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 67,700 vehicles a day, roughly 6% of them trucks, projected to reach 77,855 by 2007. The structure is 194 ft (59.1 m) long and 35 ft wide.

Location

Open in Google Maps
CarriesM-10 (ramp B)
CrossesM-10 Ramp
LocationIn Southfield (ramp A)
RouteState Highway 10
CountyOakland County
StateMichigan
Coordinates42.45696, -83.21788
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
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 rating88.6 US tons
Inventory rating52.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length194 ft (59.1 m)
Longest span76 ft (23.2 m)
Deck width35 ft (10.6 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic67,700 (1987)
Projected traffic77,855 by 2007
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
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 M-10 (ramp B) over M-10 Ramp built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 2006.

What condition is M-10 (ramp B) over M-10 Ramp 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 August 2024.

How much traffic does M-10 (ramp B) over M-10 Ramp carry?

About 67,700 vehicles per day (1987 count), of which roughly 6% are trucks.

How long is M-10 (ramp B) over M-10 Ramp?

The structure is 194 ft (59.1 m) long with a longest span of 76 ft (23.2 m) and a deck 35 ft wide.

Who owns M-10 (ramp B) over M-10 Ramp?

It is owned by the State Highway Agency.