US Bridges

Il 17 over I-55

Good

Livingston County, Illinois · 1.6 M W of Il 47 · Structure no. 053019300000000

Built
2024
1 years old
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
241 ft
2 main spans
Daily traffic
2,350
2023 count
Owner
State
State Highway Agency

About this bridge

Il 17 over I-55 is a steel continuous stringer/multi-beam or girder carrying Il 17 over I-55 in Livingston County, Illinois. It was built in 2024, so it is 1 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,350 vehicles a day, roughly 21% of them trucks, projected to reach 2,450 by 2046. The structure is 241 ft (73.6 m) long and 80 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesIl 17
CrossesI-55
Location1.6 M W of Il 47
RouteState Highway 17
Coordinates41.09367, -88.45057
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation9: Superior to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.9 US tons
Inventory rating49.3 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length241 ft (73.6 m)
Longest span119 ft (36.2 m)
Deck width80 ft (24.3 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,350 (2023)
Projected traffic2,450 by 2046
Trucks21%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed5 mi (8 km)
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 Il 17 over I-55 built?

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

What condition is Il 17 over I-55 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 October 2024.

How much traffic does Il 17 over I-55 carry?

About 2,350 vehicles per day (2023 count), of which roughly 21% are trucks.

How long is Il 17 over I-55?

The structure is 241 ft (73.6 m) long with a longest span of 119 ft (36.2 m) and a deck 80 ft wide.

Who owns Il 17 over I-55?

It is owned by the State Highway Agency.