US Bridges

Il 126 NB over I- 55

Poor

Will County, Illinois · 3.8 M N of US 30 · Structure no. 099003100000000

Built
1956
69 years old, rebuilt 1992
Condition
Poor
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
309 ft
4 main spans
Daily traffic
9,200
2024 count
Owner
State
State Highway Agency

About this bridge

Il 126 NB over I- 55 is a steel continuous stringer/multi-beam or girder carrying Il 126 NB over I- 55 in Will County, Illinois. It was built in 1956 and reconstructed in 1992, so it is 69 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 9,200 vehicles a day, roughly 10% of them trucks, projected to reach 12,816 by 2046. The structure is 309 ft (94.3 m) long and 32 ft wide.

CarriesIl 126 NB
CrossesI- 55
Location3.8 M N of US 30
RouteState Highway 126
Coordinates41.63538, -88.161
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73.5 US tons
Inventory rating44 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length309 ft (94.3 m)
Longest span87 ft (26.5 m)
Deck width32 ft (9.8 m)
Roadway width29 ft (8.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,200 (2024)
Projected traffic12,816 by 2046
Trucks10%
Lanes on structure1
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
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 126 NB over I- 55 built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 1992.

What condition is Il 126 NB over I- 55 in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in January 2025.

How much traffic does Il 126 NB over I- 55 carry?

About 9,200 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Il 126 NB over I- 55?

The structure is 309 ft (94.3 m) long with a longest span of 87 ft (26.5 m) and a deck 32 ft wide.

Who owns Il 126 NB over I- 55?

It is owned by the State Highway Agency.