US Bridges

I-75 Ramp C over I-75 Ramp C & I-75

Fair

Oakland County, Michigan · I-75 @ Chrysler Dr. · Structure no. 000000000008024

Built
1990
35 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
547 ft
3 main spans
Daily traffic
5,125
2019 count
Owner
State
State Highway Agency

About this bridge

I-75 Ramp C over I-75 Ramp C & I-75 is a steel continuous stringer/multi-beam or girder carrying I-75 Ramp C over I-75 Ramp C & I-75 in Oakland County, Michigan. It was built in 1990, so it is 35 years old, younger 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 5,125 vehicles a day, roughly 3% of them trucks, projected to reach 5,425 by 2039. The structure is 547 ft (166.8 m) long and 49 ft wide.

Location

Open in Google Maps
CarriesI-75 Ramp C
CrossesI-75 Ramp C & I-75
LocationI-75 @ Chrysler Dr.
RouteInterstate 75
CountyOakland County
StateMichigan
Coordinates42.65558, -83.23925
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating91.8 US tons
Inventory rating55 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+2 approach)
Design loadHS 20
Structure length547 ft (166.8 m)
Longest span160 ft (48.7 m)
Deck width49 ft (15 m)
Roadway width46 ft (14 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,125 (2019)
Projected traffic5,425 by 2039
Trucks3%
Lanes on structure1
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 I-75 Ramp C over I-75 Ramp C & I-75 built?

It was built in 1990, making it 35 years old in 2025.

What condition is I-75 Ramp C over I-75 Ramp C & 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 July 2023.

How much traffic does I-75 Ramp C over I-75 Ramp C & I-75 carry?

About 5,125 vehicles per day (2019 count), of which roughly 3% are trucks.

How long is I-75 Ramp C over I-75 Ramp C & I-75?

The structure is 547 ft (166.8 m) long with a longest span of 160 ft (48.7 m) and a deck 49 ft wide.

Who owns I-75 Ramp C over I-75 Ramp C & I-75?

It is owned by the State Highway Agency.