US Bridges

I-75 Ramp B over I-75 Ramp B & I-75

Good

Oakland County, Michigan · I-75 @ Chrysler Dr. · Structure no. 000000000008023

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

About this bridge

I-75 Ramp B over I-75 Ramp B & I-75 is a steel continuous stringer/multi-beam or girder carrying I-75 Ramp B over I-75 Ramp B & 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 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 5,125 vehicles a day, roughly 10% of them trucks, projected to reach 5,425 by 2039. The structure is 364 ft (110.9 m) long and 36 ft wide.

Location

Open in Google Maps
CarriesI-75 Ramp B
CrossesI-75 Ramp B & I-75
LocationI-75 @ Chrysler Dr.
RouteInterstate 75
CountyOakland County
StateMichigan
Coordinates42.65186, -83.23822
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 inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating97.1 US tons
Inventory rating58.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+1 approach)
Design loadHS 20
Structure length364 ft (110.9 m)
Longest span115 ft (35.1 m)
Deck width36 ft (11 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,125 (2019)
Projected traffic5,425 by 2039
Trucks10%
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 I-75 Ramp B over I-75 Ramp B & I-75 built?

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

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

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

About 5,125 vehicles per day (2019 count), of which roughly 10% are trucks.

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

The structure is 364 ft (110.9 m) long with a longest span of 115 ft (35.1 m) and a deck 36 ft wide.

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

It is owned by the State Highway Agency.