HWY Carlisle ST over I 495
Fair Condition64 years old5,200 vehicles/day
Location
| State | Massachusetts |
| County | Middlesex |
| Location | 1.6 Km E RT 3 |
| Carries | HWY Carlisle ST |
| Crosses | I 495 |
| Coordinates | 42.61211, -71.30651 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 5 (Fair) |
| Superstructure | 5 (Fair) |
| Substructure | 5 (Fair) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 246.1 ft (75 m) |
| Max Span | 86.9 ft (26.5 m) |
| Deck Width | 49.2 ft (15 m) |
| Deck Area | 1,125 sq m |
| Main Spans | 4 |
| Year Built | 1962 |
Traffic
| Avg Daily Traffic | 5,200 (2020) |
| Truck Traffic | 6% |
| Lanes On Bridge | 2 |
| Lanes Under Bridge | 6 |
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 | C080382LVDOTNBI |