US Bridges

I-55/I-74 NB over Union Pacific Railroad

Good

McLean County, Illinois · 2.4 MI S JCT Ill 9 · Structure no. 057000700000000

Built
1963
62 years old, rebuilt 1996
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
226 ft
3 main spans
Daily traffic
21,550
2023 count
Owner
State
State Highway Agency

About this bridge

I-55/I-74 NB over Union Pacific Railroad is a steel continuous stringer/multi-beam or girder carrying I-55/I-74 NB over Union Pacific Railroad in McLean County, Illinois. It was built in 1963 and reconstructed in 1996, so it is 62 years old, older 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 21,550 vehicles a day, roughly 37% of them trucks, projected to reach 22,422 by 2046. The structure is 226 ft (68.9 m) long and 69 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-55/I-74 NB
CrossesUnion Pacific Railroad
Location2.4 MI S JCT Ill 9
RouteInterstate 55
CountyMcLean County
StateIllinois
Coordinates40.45235, -89.02373
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80.4 US tons
Inventory rating48.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length226 ft (68.9 m)
Longest span88 ft (26.8 m)
Deck width69 ft (21 m)
Roadway width66 ft (20.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,550 (2023)
Projected traffic22,422 by 2046
Trucks37%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I-55/I-74 NB over Union Pacific Railroad built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 1996.

What condition is I-55/I-74 NB over Union Pacific Railroad 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 May 2024.

How much traffic does I-55/I-74 NB over Union Pacific Railroad carry?

About 21,550 vehicles per day (2023 count), of which roughly 37% are trucks.

How long is I-55/I-74 NB over Union Pacific Railroad?

The structure is 226 ft (68.9 m) long with a longest span of 88 ft (26.8 m) and a deck 69 ft wide.

Who owns I-55/I-74 NB over Union Pacific Railroad?

It is owned by the State Highway Agency.