US Bridges

Il 394 NB over RR - Cn

Fair

Cook County, Illinois · I80/294 & Ill 394 · Structure no. 016279700000000

Built
2006
19 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
247 ft
3 main spans
Daily traffic
72,000
2024 count
Owner
State
State Highway Agency

About this bridge

Il 394 NB over RR - Cn is a prestressed concrete continuous stringer/multi-beam or girder carrying Il 394 NB over RR - Cn in Cook County, Illinois. It was built in 2006, so it is 19 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 72,000 vehicles a day, roughly 10% of them trucks, projected to reach 47,773 by 2046. The structure is 247 ft (75.2 m) long and 93 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesIl 394 NB
CrossesRR - Cn
LocationI80/294 & Ill 394
RouteState Highway 394
CountyCook County
StateIllinois
Coordinates41.57454, -87.58301
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.8 US tons
Inventory rating44.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length247 ft (75.2 m)
Longest span95 ft (29 m)
Deck width93 ft (28.4 m)
Roadway width87 ft (26.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic72,000 (2024)
Projected traffic47,773 by 2046
Trucks10%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemYes

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 Il 394 NB over RR - Cn built?

It was built in 2006, making it 19 years old in 2025.

What condition is Il 394 NB over RR - Cn 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 May 2023.

How much traffic does Il 394 NB over RR - Cn carry?

About 72,000 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Il 394 NB over RR - Cn?

The structure is 247 ft (75.2 m) long with a longest span of 95 ft (29 m) and a deck 93 ft wide.

Who owns Il 394 NB over RR - Cn?

It is owned by the State Highway Agency.