I-255 SB Mainline over I-270
Good Condition39 years old20,250 vehicles/day
Location
| State | Illinois |
| County | Madison |
| Location | 1.9mi W Ill 157 |
| Carries | I-255 SB Mainline |
| Crosses | I-270 |
| Coordinates | 38.75624, -90.04354 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Steel Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 277.6 ft (84.6 m) |
| Max Span | 107.9 ft (32.9 m) |
| Deck Width | 59.1 ft (18 m) |
| Deck Area | 1522.8 sq m |
| Main Spans | 3 |
| Year Built | 1987 |
Traffic
| Avg Daily Traffic | 20,250 (2023) |
| Truck Traffic | 10% |
| Lanes On Bridge | 3 |
| Lanes Under Bridge | 9 |
Inspection & Ownership
| Last Inspection | November 2024 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 060022200000000 |