US Bridges

I-496 WB over I-496 Ramp to Lansing RD

Fair

Ingham County, Michigan · W Lts of Lansing · Structure no. 000000000003750

Built
1969
56 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
166 ft
3 main spans
Daily traffic
25,725
2018 count
Owner
State
State Highway Agency

About this bridge

I-496 WB over I-496 Ramp to Lansing RD is a steel stringer/multi-beam or girder carrying I-496 WB over I-496 Ramp to Lansing RD in Ingham County, Michigan. It was built in 1969, so it is 56 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 25,725 vehicles a day, roughly 4% of them trucks, projected to reach 28,700 by 2040. The structure is 166 ft (50.7 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-496 WB
CrossesI-496 Ramp to Lansing RD
LocationW Lts of Lansing
RouteInterstate 496
CountyIngham County
StateMichigan
Coordinates42.72566, -84.58643
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 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 geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.7 US tons
Inventory rating39.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length166 ft (50.7 m)
Longest span70 ft (21.3 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,725 (2018)
Projected traffic28,700 by 2040
Trucks4%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-496 WB over I-496 Ramp to Lansing RD built?

It was built in 1969, making it 56 years old in 2025.

What condition is I-496 WB over I-496 Ramp to Lansing RD 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 September 2023.

How much traffic does I-496 WB over I-496 Ramp to Lansing RD carry?

About 25,725 vehicles per day (2018 count), of which roughly 4% are trucks.

How long is I-496 WB over I-496 Ramp to Lansing RD?

The structure is 166 ft (50.7 m) long with a longest span of 70 ft (21.3 m) and a deck 43 ft wide.

Who owns I-496 WB over I-496 Ramp to Lansing RD?

It is owned by the State Highway Agency.