US Bridges

11 MI RD over I-75

Good

Oakland County, Michigan · In Royal Oak · Structure no. 000000000008099

Built
2021
4 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
167 ft
2 main spans
Daily traffic
3,600
1974 count
Owner
State
State Highway Agency

About this bridge

11 MI RD over I-75 is a prestressed concrete stringer/multi-beam or girder carrying 11 MI RD over I-75 in Oakland County, Michigan. It was built in 2021, so it is 4 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 3,600 vehicles a day, roughly 3% of them trucks, projected to reach 3,600 by 1977. The structure is 167 ft (50.9 m) long and 91 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
Carries11 MI RD
CrossesI-75
LocationIn Royal Oak
RouteCounty Highway 2059
CountyOakland County
StateMichigan
Coordinates42.49058, -83.11611
Functional classUrban Minor Arterial

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 geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.5 US tons
Inventory rating54.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadGreater than HL 93
Structure length167 ft (50.9 m)
Longest span87 ft (26.5 m)
Deck width91 ft (27.6 m)
Roadway width76 ft (23.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,600 (1974)
Projected traffic3,600 by 1977
Trucks3%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.1 mi (5 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 proposedDeck replacement with only incidental widening
Estimated improvement cost$129,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was 11 MI RD over I-75 built?

It was built in 2021, making it 4 years old in 2025.

What condition is 11 MI 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 11 MI RD over I-75 carry?

About 3,600 vehicles per day (1974 count), of which roughly 3% are trucks.

How long is 11 MI RD over I-75?

The structure is 167 ft (50.9 m) long with a longest span of 87 ft (26.5 m) and a deck 91 ft wide.

Who owns 11 MI RD over I-75?

It is owned by the State Highway Agency.