I-355 SB over US 20
Fair Condition56 years old70,250 vehicles/day
Location
| State | Illinois |
| County | DuPage |
| Location | 1.5 M S Il 19 |
| Carries | I-355 SB |
| Crosses | US 20 |
| Coordinates | 41.95162, -88.03486 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 7 (Good) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Steel Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 186.7 ft (56.9 m) |
| Max Span | 96.1 ft (29.3 m) |
| Deck Width | 60.7 ft (18.5 m) |
| Deck Area | 1052.7 sq m |
| Main Spans | 3 |
| Year Built | 1970 (reconstructed 1988) |
Traffic
| Avg Daily Traffic | 70,250 (2023) |
| Truck Traffic | 10% |
| Lanes On Bridge | 3 |
| Lanes Under Bridge | 6 |
Inspection & Ownership
| Last Inspection | November 2023 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 022011100000000 |