I-55 Busn Loop over Norfolk Southern Railway
PoorMcLean County, Illinois · 0.49 MI E of US 51 · Structure no. 057006400000000
- Built
- 1940
- 85 years old, rebuilt 1987
- Condition
- Poor
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 306 ft
- 5 main spans
- Daily traffic
- 25,000
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I-55 Busn Loop over Norfolk Southern Railway is a steel continuous stringer/multi-beam or girder carrying I-55 Busn Loop over Norfolk Southern Railway in McLean County, Illinois. It was built in 1940 and reconstructed in 1987, so it is 85 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 25,000 vehicles a day, roughly 5% of them trucks, projected to reach 23,533 by 2046. The structure is 306 ft (93.3 m) long and 59 ft wide. If it were closed, the detour would be 1.9 mi (3 km).
Location
Open in Google MapsCondition and inspection
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.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I-55 Busn Loop over Norfolk Southern Railway built?
It was built in 1940, making it 85 years old in 2025. It was reconstructed in 1987.
What condition is I-55 Busn Loop over Norfolk Southern Railway 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 May 2024.
How much traffic does I-55 Busn Loop over Norfolk Southern Railway carry?
About 25,000 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is I-55 Busn Loop over Norfolk Southern Railway?
The structure is 306 ft (93.3 m) long with a longest span of 66 ft (20 m) and a deck 59 ft wide.
Who owns I-55 Busn Loop over Norfolk Southern Railway?
It is owned by the State Highway Agency.