Interstate 780

Interstate 780 marker
Interstate 780
Map
I-780 highlighted in red
Route information
Auxiliary route of I-80
Maintained by Caltrans
Length6.5 mi[1] (10.5 km)
Existed1973-1976–present
HistoryState highway in 1935; Interstate (as I-680) in 1955; renumbered I-780 in 1973–76
NHSEntire route
Major junctions
West endCurtola Pkwy & Lemon St in Vallejo
Major intersections I-80 in Vallejo
East end I-680 in Benicia
Location
CountryUnited States
StateCalifornia
CountiesSolano
Highway system
I-710 I-805

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.

  1. ^ "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.