US Bridges

Gardenia RD over I-75

Good

Oakland County, Michigan · In Royal Oak · Structure no. 000000000008056

Built
2022
3 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
177 ft
2 main spans
Daily traffic
8,070
1996 count
Owner
State
State Highway Agency

About this bridge

Gardenia RD over I-75 is a prestressed concrete stringer/multi-beam or girder carrying Gardenia RD over I-75 in Oakland County, Michigan. It was built in 2022, so it is 3 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 8,070 vehicles a day, projected to reach 8,070 by 2016. The structure is 177 ft (54.1 m) long and 67 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesGardenia RD
CrossesI-75
LocationIn Royal Oak
RouteCity Street 0
CountyOakland County
StateMichigan
Coordinates42.4984, -83.11722
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69.7 US tons
Inventory rating53.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadGreater than HL 93
Structure length177 ft (54.1 m)
Longest span90 ft (27.4 m)
Deck width67 ft (20.3 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,070 (1996)
Projected traffic8,070 by 2016
Trucks—
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

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 Gardenia RD over I-75 built?

It was built in 2022, making it 3 years old in 2025.

What condition is Gardenia RD 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 April 2023.

How much traffic does Gardenia RD over I-75 carry?

About 8,070 vehicles per day (1996 count).

How long is Gardenia RD over I-75?

The structure is 177 ft (54.1 m) long with a longest span of 90 ft (27.4 m) and a deck 67 ft wide.

Who owns Gardenia RD over I-75?

It is owned by the State Highway Agency.