US Bridges

I-355 over Bn RR

Good

DuPage County, Illinois · 1M.E.OF IL-53 · Structure no. 022997900000000

Built
1989
36 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
192 ft
3 main spans
Daily traffic
147,200
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

I-355 over Bn RR is a prestressed concrete stringer/multi-beam or girder carrying I-355 over Bn RR in DuPage County, Illinois. It was built in 1989, so it is 36 years old, younger than the Illinois average of 45.3 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 147,200 vehicles a day, roughly 13% of them trucks, projected to reach 119,180 by 2046. The structure is 192 ft (58.5 m) long and 170 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesI-355
CrossesBn RR
Location1M.E.OF IL-53
RouteInterstate 355
CountyDuPage County
StateIllinois
Coordinates41.79731, -88.05705
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.2 US tons
Inventory rating46.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length192 ft (58.5 m)
Longest span81 ft (24.8 m)
Deck width170 ft (51.7 m)
Roadway width165 ft (50.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic147,200 (2023)
Projected traffic119,180 by 2046
Trucks13%
Lanes on structure9
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed3.7 mi (6 km)
TollOn a toll road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$625,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-355 over Bn RR built?

It was built in 1989, making it 36 years old in 2025.

What condition is I-355 over Bn RR 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 April 2024.

How much traffic does I-355 over Bn RR carry?

About 147,200 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is I-355 over Bn RR?

The structure is 192 ft (58.5 m) long with a longest span of 81 ft (24.8 m) and a deck 170 ft wide.

Who owns I-355 over Bn RR?

It is owned by the State Toll Authority.