Il 171 SB Rmp I-55 over I- 55 Stevenson
GoodCook County, Illinois · 1.4M SW of IL43 · Structure no. 016151200000000
- Built
- 2015
- 10 years old
- Condition
- Good
- inspected November 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 283 ft
- 3 main spans
- Daily traffic
- 10,500
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Il 171 SB Rmp I-55 over I- 55 Stevenson is a steel continuous stringer/multi-beam or girder carrying Il 171 SB Rmp I-55 over I- 55 Stevenson in Cook County, Illinois. It was built in 2015, so it is 10 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 10,500 vehicles a day, roughly 11% of them trucks, projected to reach 10,100 by 2046. The structure is 283 ft (86.3 m) long and 35 ft wide.
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Il 171 SB Rmp I-55 over I- 55 Stevenson built?
It was built in 2015, making it 10 years old in 2025.
What condition is Il 171 SB Rmp I-55 over I- 55 Stevenson 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 November 2023.
How much traffic does Il 171 SB Rmp I-55 over I- 55 Stevenson carry?
About 10,500 vehicles per day (2024 count), of which roughly 11% are trucks.
How long is Il 171 SB Rmp I-55 over I- 55 Stevenson?
The structure is 283 ft (86.3 m) long with a longest span of 116 ft (35.3 m) and a deck 35 ft wide.
Who owns Il 171 SB Rmp I-55 over I- 55 Stevenson?
It is owned by the State Highway Agency.