US Bridges

Laplaisance RD over I-75

Good

Monroe County, Michigan · 3.9 MI SW of M-50 · Structure no. 000000000007183

Built
2021
4 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
192 ft
2 main spans
Daily traffic
3,500
2017 count
Owner
State
State Highway Agency

About this bridge

Laplaisance RD over I-75 is a prestressed concrete stringer/multi-beam or girder carrying Laplaisance RD over I-75 in Monroe 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 3,500 vehicles a day, roughly 10% of them trucks, projected to reach 4,025 by 2037. The structure is 192 ft (58.5 m) long and 47 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesLaplaisance RD
CrossesI-75
Location3.9 MI SW of M-50
RouteCounty Highway 2016
CountyMonroe County
StateMichigan
Coordinates41.87786, -83.39458
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 inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.7 US tons
Inventory rating42.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadGreater than HL 93
Structure length192 ft (58.5 m)
Longest span94 ft (28.5 m)
Deck width47 ft (14.2 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,500 (2017)
Projected traffic4,025 by 2037
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 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 Laplaisance RD over I-75 built?

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

What condition is Laplaisance 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 June 2023.

How much traffic does Laplaisance RD over I-75 carry?

About 3,500 vehicles per day (2017 count), of which roughly 10% are trucks.

How long is Laplaisance RD over I-75?

The structure is 192 ft (58.5 m) long with a longest span of 94 ft (28.5 m) and a deck 47 ft wide.

Who owns Laplaisance RD over I-75?

It is owned by the State Highway Agency.