US Bridges

I-55 Busn Loop NB over I-74/SW Bloomington

Fair

McLean County, Illinois · 55 Busn Lp Ov I-74 · Structure no. 057025100000000

Built
2013
12 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
183 ft
3 main spans
Daily traffic
6,950
2023 count
Owner
State
State Highway Agency

About this bridge

I-55 Busn Loop NB over I-74/SW Bloomington is a steel continuous stringer/multi-beam or girder carrying I-55 Busn Loop NB over I-74/SW Bloomington in McLean County, Illinois. It was built in 2013, so it is 12 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 6 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 6,950 vehicles a day, roughly 10% of them trucks, projected to reach 3,131 by 2046. The structure is 183 ft (55.8 m) long and 62 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-55 Busn Loop NB
CrossesI-74/SW Bloomington
Location55 Busn Lp Ov I-74
RouteInterstate 55
CountyMcLean County
StateIllinois
Coordinates40.44055, -89.01926
Functional classUrban Other Principal 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
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 rating67.5 US tons
Inventory rating51.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length183 ft (55.8 m)
Longest span81 ft (24.7 m)
Deck width62 ft (19 m)
Roadway width59 ft (18 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,950 (2023)
Projected traffic3,131 by 2046
Trucks10%
Lanes on structure3
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.2 mi (2 km)
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-55 Busn Loop NB over I-74/SW Bloomington built?

It was built in 2013, making it 12 years old in 2025.

What condition is I-55 Busn Loop NB over I-74/SW Bloomington 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 Busn Loop NB over I-74/SW Bloomington carry?

About 6,950 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is I-55 Busn Loop NB over I-74/SW Bloomington?

The structure is 183 ft (55.8 m) long with a longest span of 81 ft (24.7 m) and a deck 62 ft wide.

Who owns I-55 Busn Loop NB over I-74/SW Bloomington?

It is owned by the State Highway Agency.