US Bridges

I-496 WB over CSX RR & Trowbridge Rmp

Good

Ingham County, Michigan · In East Lansing · Structure no. 000000000003758

Built
2024
1 years old
Condition
Good
inspected December 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
315 ft
3 main spans
Daily traffic
39,163
2019 count
Owner
State
State Highway Agency

About this bridge

I-496 WB over CSX RR & Trowbridge Rmp is a prestressed concrete stringer/multi-beam or girder carrying I-496 WB over CSX RR & Trowbridge Rmp in Ingham County, Michigan. It was built in 2024, so it is 1 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 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 39,163 vehicles a day, roughly 4% of them trucks, projected to reach 44,254 by 2039. The structure is 315 ft (96.1 m) long and 75 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-496 WB
CrossesCSX RR & Trowbridge Rmp
LocationIn East Lansing
RouteInterstate 496
CountyIngham County
StateMichigan
Coordinates42.72041, -84.50412
Functional classUrban Principal Arterial - Interstate

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.
Superstructure9 ExcellentNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 10 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66 US tons
Inventory rating40.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadGreater than HL 93
Structure length315 ft (96.1 m)
Longest span155 ft (47.2 m)
Deck width75 ft (23 m)
Roadway width72 ft (21.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic39,163 (2019)
Projected traffic44,254 by 2039
Trucks4%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-496 WB over CSX RR & Trowbridge Rmp built?

It was built in 2024, making it 1 years old in 2025.

What condition is I-496 WB over CSX RR & Trowbridge Rmp 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 December 2024.

How much traffic does I-496 WB over CSX RR & Trowbridge Rmp carry?

About 39,163 vehicles per day (2019 count), of which roughly 4% are trucks.

How long is I-496 WB over CSX RR & Trowbridge Rmp?

The structure is 315 ft (96.1 m) long with a longest span of 155 ft (47.2 m) and a deck 75 ft wide.

Who owns I-496 WB over CSX RR & Trowbridge Rmp?

It is owned by the State Highway Agency.