.svg) Interstate 780 | ||||
|---|---|---|---|---|
 I-780 highlighted in red | ||||
| Route information | ||||
| Auxiliary route of I-80 | ||||
| Maintained by Caltrans | ||||
| Length | 6.5 mi[1] (10.5 km) | |||
| Existed | 1973-1976–present | |||
| History | State highway in 1935; Interstate (as I-680) in 1955; renumbered I-780 in 1973–76 | |||
| NHS | Entire route | |||
| Major junctions | ||||
| West end | Curtola Pkwy & Lemon St in Vallejo | |||
 I-80 in Vallejo | ||||
| East end |  I-680 in Benicia | |||
| Location | ||||
| Country | United States | |||
| State | California | |||
| Counties | Solano | |||
| Highway system | ||||
| ||||
Interstate 780 (I-780) is an east–west auxiliary Interstate Highway in the San Francisco Bay Area of Northern California. It runs from Curtola Parkway and Lemon Street in Vallejo to I-680 just north of the Benicia–Martinez Bridge in Benicia. It closely parallels the Carquinez Strait for its entire route. Originally, this segment was part of I-680 before that Interstate was extended and rerouted to Fairfield. The city-maintained Curtola Parkway continues west from I-80 to State Route 29 (SR 29) in Vallejo.
- ^ "Table 2: Auxiliary Routes of the Dwight D. Eisenhower National System Of Interstate and Defense Highways". FHWA Route Log and Finder List. Federal Highway Administration. December 31, 2021. Retrieved July 13, 2022.