US Bridges

I-55 Nbl over I-55 Busn Loop

Fair

McLean County, Illinois · Nbl Ovr 55 Busn Loop · Structure no. 057024900000000

Built
2010
15 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
200 ft
3 main spans
Daily traffic
10,650
2023 count
Owner
State
State Highway Agency

About this bridge

I-55 Nbl over I-55 Busn Loop is a steel continuous stringer/multi-beam or girder carrying I-55 Nbl over I-55 Busn Loop in McLean County, Illinois. It was built in 2010, so it is 15 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 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 10,650 vehicles a day, roughly 39% of them trucks, projected to reach 10,959 by 2046. The structure is 200 ft (61 m) long and 47 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-55 Nbl
CrossesI-55 Busn Loop
LocationNbl Ovr 55 Busn Loop
RouteInterstate 55
CountyMcLean County
StateIllinois
Coordinates40.43919, -89.02363
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMarch 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 rating68.9 US tons
Inventory rating41.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length200 ft (61 m)
Longest span92 ft (28 m)
Deck width47 ft (14.2 m)
Roadway width44 ft (13.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,650 (2023)
Projected traffic10,959 by 2046
Trucks39%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
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 Nbl over I-55 Busn Loop built?

It was built in 2010, making it 15 years old in 2025.

What condition is I-55 Nbl over I-55 Busn Loop 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 2024.

How much traffic does I-55 Nbl over I-55 Busn Loop carry?

About 10,650 vehicles per day (2023 count), of which roughly 39% are trucks.

How long is I-55 Nbl over I-55 Busn Loop?

The structure is 200 ft (61 m) long with a longest span of 92 ft (28 m) and a deck 47 ft wide.

Who owns I-55 Nbl over I-55 Busn Loop?

It is owned by the State Highway Agency.