US Bridges

Cass Ave over I-75

Good

Wayne County, Michigan · In Detroit · Structure no. 000000000011778

Built
1967
58 years old, rebuilt 2007
Condition
Good
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
172 ft
2 main spans
Daily traffic
11,980
1978 count
Owner
State
State Highway Agency

About this bridge

Cass Ave over I-75 is a steel stringer/multi-beam or girder carrying Cass Ave over I-75 in Wayne County, Michigan. It was built in 1967 and reconstructed in 2007, so it is 58 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 11,980 vehicles a day, roughly 4% of them trucks, projected to reach 12,700 by 2026. The structure is 172 ft (52.4 m) long and 78 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesCass Ave
CrossesI-75
LocationIn Detroit
RouteCity Street 2000
Coordinates42.33807, -83.05645
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating92.8 US tons
Inventory rating55.3 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length172 ft (52.4 m)
Longest span93 ft (28.2 m)
Deck width78 ft (23.8 m)
Roadway width54 ft (16.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,980 (1978)
Projected traffic12,700 by 2026
Trucks4%
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 Cass Ave over I-75 built?

It was built in 1967, making it 58 years old in 2025. It was reconstructed in 2007.

What condition is Cass Ave 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 March 2024.

How much traffic does Cass Ave over I-75 carry?

About 11,980 vehicles per day (1978 count), of which roughly 4% are trucks.

How long is Cass Ave over I-75?

The structure is 172 ft (52.4 m) long with a longest span of 93 ft (28.2 m) and a deck 78 ft wide.

Who owns Cass Ave over I-75?

It is owned by the State Highway Agency.