US Bridges

Mack Ave over I-75

Good

Wayne County, Michigan · In Detroit · Structure no. 000000000011815

Built
1961
64 years old, rebuilt 2007
Condition
Good
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
205 ft
4 main spans
Daily traffic
19,710
2007 count
Owner
State
State Highway Agency

About this bridge

Mack Ave over I-75 is a steel stringer/multi-beam or girder carrying Mack Ave over I-75 in Wayne County, Michigan. It was built in 1961 and reconstructed in 2007, so it is 64 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 19,710 vehicles a day, roughly 3% of them trucks, projected to reach 21,681 by 2022. The structure is 205 ft (62.6 m) long and 151 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesMack Ave
CrossesI-75
LocationIn Detroit
RouteCity Street 2000
CountyWayne County
StateMichigan
Coordinates42.35122, -83.04782
Functional classUrban Other Principal 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 inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81.5 US tons
Inventory rating48.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length205 ft (62.6 m)
Longest span74 ft (22.7 m)
Deck width151 ft (46 m)
Roadway width125 ft (38 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,710 (2007)
Projected traffic21,681 by 2022
Trucks3%
Lanes on structure10
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 km)
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 Mack Ave over I-75 built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 2007.

What condition is Mack 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 November 2023.

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

About 19,710 vehicles per day (2007 count), of which roughly 3% are trucks.

How long is Mack Ave over I-75?

The structure is 205 ft (62.6 m) long with a longest span of 74 ft (22.7 m) and a deck 151 ft wide.

Who owns Mack Ave over I-75?

It is owned by the State Highway Agency.