US Bridges

I-355 NB & SB over Bn&sf RR

Fair

Will County, Illinois · 1M E of Joliet RD · Structure no. 099033500000000

Built
2008
17 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
196 ft
3 main spans
Daily traffic
41,950
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

I-355 NB & SB over Bn&sf RR is a prestressed concrete continuous stringer/multi-beam or girder carrying I-355 NB & SB over Bn&sf RR in Will County, Illinois. It was built in 2008, so it is 17 years old, younger than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 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 41,950 vehicles a day, roughly 16% of them trucks, projected to reach 47,448 by 2046. The structure is 196 ft (59.6 m) long and 90 ft wide.

Location

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CarriesI-355 NB & SB
CrossesBn&sf RR
Location1M E of Joliet RD
RouteInterstate 355
CountyWill County
StateIllinois
Coordinates41.69717, -88.03019
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66 US tons
Inventory rating39.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length196 ft (59.6 m)
Longest span81 ft (24.7 m)
Deck width90 ft (27.3 m)
Roadway width86 ft (26.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic41,950 (2023)
Projected traffic47,448 by 2046
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed—
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-355 NB & SB over Bn&sf RR built?

It was built in 2008, making it 17 years old in 2025.

What condition is I-355 NB & SB over Bn&sf RR 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 August 2023.

How much traffic does I-355 NB & SB over Bn&sf RR carry?

About 41,950 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is I-355 NB & SB over Bn&sf RR?

The structure is 196 ft (59.6 m) long with a longest span of 81 ft (24.7 m) and a deck 90 ft wide.

Who owns I-355 NB & SB over Bn&sf RR?

It is owned by the State Toll Authority.