Il 56 over I-355
FairDuPage County, Illinois · 1 M E of Il 53 · Structure no. 022022000000000
- Built
- 1988
- 37 years old
- Condition
- Fair
- inspected May 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 307 ft
- 4 main spans
- Daily traffic
- 33,000
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Il 56 over I-355 is a prestressed concrete continuous stringer/multi-beam or girder carrying Il 56 over I-355 in DuPage County, Illinois. It was built in 1988, so it is 37 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 33,000 vehicles a day, roughly 2% of them trucks, projected to reach 31,007 by 2046. The structure is 307 ft (93.6 m) long and 136 ft wide. If it were closed, the detour would be 3.1 mi (5 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Il 56 over I-355 built?
It was built in 1988, making it 37 years old in 2025.
What condition is Il 56 over I-355 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 May 2023.
How much traffic does Il 56 over I-355 carry?
About 33,000 vehicles per day (2023 count), of which roughly 2% are trucks.
How long is Il 56 over I-355?
The structure is 307 ft (93.6 m) long with a longest span of 88 ft (26.8 m) and a deck 136 ft wide.
Who owns Il 56 over I-355?
It is owned by the State Highway Agency.