US Bridges

M-155 (mason Rd) over I-96

Fair

Livingston County, Michigan · @ M-155 · Structure no. 000000000005780

Built
1962
63 years old, rebuilt 2000
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
348 ft
4 main spans
Daily traffic
10,413
2007 count
Owner
State
State Highway Agency

About this bridge

M-155 (mason Rd) over I-96 is a steel stringer/multi-beam or girder carrying M-155 (mason Rd) over I-96 in Livingston County, Michigan. It was built in 1962 and reconstructed in 2000, so it is 63 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 10,413 vehicles a day, roughly 6% of them trucks, projected to reach 13,296 by 2018. The structure is 348 ft (106.1 m) long and 37 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesM-155 (mason Rd)
CrossesI-96
Location@ M-155
RouteState Highway 155
CountyLivingston County
StateMichigan
Coordinates42.60016, -83.9465
Functional classUrban Minor 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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 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 geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73.2 US tons
Inventory rating44 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length348 ft (106.1 m)
Longest span97 ft (29.5 m)
Deck width37 ft (11.2 m)
Roadway width35 ft (10.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,413 (2007)
Projected traffic13,296 by 2018
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 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 M-155 (mason Rd) over I-96 built?

It was built in 1962, making it 63 years old in 2025. It was reconstructed in 2000.

What condition is M-155 (mason Rd) over I-96 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 April 2023.

How much traffic does M-155 (mason Rd) over I-96 carry?

About 10,413 vehicles per day (2007 count), of which roughly 6% are trucks.

How long is M-155 (mason Rd) over I-96?

The structure is 348 ft (106.1 m) long with a longest span of 97 ft (29.5 m) and a deck 37 ft wide.

Who owns M-155 (mason Rd) over I-96?

It is owned by the State Highway Agency.