US Bridges

31st ST over I-294 Tri State Toll

Fair

Cook County, Illinois · 1 M N US 34 · Structure no. 016086700000000

Built
1958
67 years old, rebuilt 1992
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
290 ft
2 main spans
Daily traffic
14,700
2022 count
Owner
State
State Highway Agency

About this bridge

31st ST over I-294 Tri State Toll is a prestressed concrete continuous stringer/multi-beam or girder carrying 31st ST over I-294 Tri State Toll in Cook County, Illinois. It was built in 1958 and reconstructed in 1992, so it is 67 years old, older 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 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 14,700 vehicles a day, roughly 3% of them trucks, projected to reach 18,685 by 2046. The structure is 290 ft (88.5 m) long and 71 ft wide.

Location

Open in Google Maps
Carries31st ST
CrossesI-294 Tri State Toll
Location1 M N US 34
CountyCook County
StateIllinois
Coordinates41.83315, -87.91866
Functional classUrban Minor Arterial

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionMarch 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.6 US tons
Inventory rating30.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20
Structure length290 ft (88.5 m)
Longest span118 ft (36.1 m)
Deck width71 ft (21.7 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,700 (2022)
Projected traffic18,685 by 2046
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemNo

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 31st ST over I-294 Tri State Toll built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 1992.

What condition is 31st ST over I-294 Tri State Toll 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 March 2023.

How much traffic does 31st ST over I-294 Tri State Toll carry?

About 14,700 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 31st ST over I-294 Tri State Toll?

The structure is 290 ft (88.5 m) long with a longest span of 118 ft (36.1 m) and a deck 71 ft wide.

Who owns 31st ST over I-294 Tri State Toll?

It is owned by the State Highway Agency.