I-475 over Detroit ST
GoodGenesee County, Michigan · 3.0 MI E of N JCT I-75 · Structure no. 000000000002686
- Built
- 1971
- 54 years old
- Condition
- Good
- inspected April 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 112 ft
- 3 main spans
- Daily traffic
- 23,600
- 2016 count
- Owner
- State
- State Highway Agency
About this bridge
I-475 over Detroit ST is a prestressed concrete stringer/multi-beam or girder carrying I-475 over Detroit ST in Genesee County, Michigan. It was built in 1971, so it is 54 years old, older 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 23,600 vehicles a day, roughly 7% of them trucks, projected to reach 26,100 by 2036. The structure is 112 ft (34.1 m) long and 100 ft wide. If it were closed, the detour would be 1.9 mi (3 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I-475 over Detroit ST built?
It was built in 1971, making it 54 years old in 2025.
What condition is I-475 over Detroit ST 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 2024.
How much traffic does I-475 over Detroit ST carry?
About 23,600 vehicles per day (2016 count), of which roughly 7% are trucks.
How long is I-475 over Detroit ST?
The structure is 112 ft (34.1 m) long with a longest span of 45 ft (13.8 m) and a deck 100 ft wide.
Who owns I-475 over Detroit ST?
It is owned by the State Highway Agency.