US Bridges

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

Good

McLean County, Illinois · 55 Busn Lp Ov I-74 · Structure no. 057025300000000

Built
2013
12 years old
Condition
Good
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
204 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 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 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 6,950 vehicles a day, roughly 10% of them trucks, projected to reach 3,131 by 2046. The structure is 204 ft (62.3 m) long and 51 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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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

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.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.7 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length204 ft (62.3 m)
Longest span94 ft (28.8 m)
Deck width51 ft (15.5 m)
Roadway width48 ft (14.6 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 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 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 204 ft (62.3 m) long with a longest span of 94 ft (28.8 m) and a deck 51 ft wide.

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

It is owned by the State Highway Agency.