US Bridges

US-24 over Conrail

Fair

Wayne County, Michigan · 4.5 MI N of Flat Rock · Structure no. 000000000011284

Built
1935
90 years old, rebuilt 1983
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
165 ft
3 main spans
Daily traffic
23,232
2007 count
Owner
State
State Highway Agency

About this bridge

US-24 over Conrail is a steel stringer/multi-beam or girder carrying US-24 over Conrail in Wayne County, Michigan. It was built in 1935 and reconstructed in 1983, so it is 90 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 23,232 vehicles a day, roughly 2% of them trucks, projected to reach 23,438 by 2018. The structure is 165 ft (50.3 m) long and 62 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesUS-24
CrossesConrail
Location4.5 MI N of Flat Rock
RouteU.S. Route 24
Coordinates42.17856, -83.26704
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating89.6 US tons
Inventory rating53.6 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length165 ft (50.3 m)
Longest span57 ft (17.3 m)
Deck width62 ft (18.8 m)
Roadway width58 ft (17.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,232 (2007)
Projected traffic23,438 by 2018
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed3.1 mi (5 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 US-24 over Conrail built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1983.

What condition is US-24 over Conrail in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2023.

How much traffic does US-24 over Conrail carry?

About 23,232 vehicles per day (2007 count), of which roughly 2% are trucks.

How long is US-24 over Conrail?

The structure is 165 ft (50.3 m) long with a longest span of 57 ft (17.3 m) and a deck 62 ft wide.

Who owns US-24 over Conrail?

It is owned by the State Highway Agency.