I-280 Northbound over Alpine RD & Los Trancos
Poor Condition57 years old46,500 vehicles/day
Location
| State | California |
| County | San Mateo |
| Location | 04-sm-280-r0.01 |
| Carries | I-280 Northbound |
| Crosses | Alpine RD & Los Trancos |
| Coordinates | 37.40906, -122.19377 |
Condition Ratings
| Overall Condition | Poor |
| Deck | 4 (Poor) |
| Superstructure | 5 (Fair) |
| Substructure | 7 (Good) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Box Beam - Multiple |
| Total Length | 365.2 ft (111.3 m) |
| Max Span | 91.9 ft (28 m) |
| Deck Width | 69.6 ft (21.2 m) |
| Deck Area | 2359.6 sq m |
| Main Spans | 4 |
| Year Built | 1969 |
Traffic
| Avg Daily Traffic | 46,500 (2009) |
| Lanes On Bridge | 4 |
| Lanes Under Bridge | 6 |
Inspection & Ownership
| Last Inspection | October 2023 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 35 0009R |