Interstate 780 California
Interstate 780 is a four lane freeway joining the cities of Vallejo and Benicia along a parallel alignment to Carquinez Strait in Solano County. The end of I-780 at Lemon Street ties into Curtola Parkway, a four lane arterial spurring west to California State Route 29 (Sonoma Boulevard) near Downtown Vallejo.
The link between I-80/680 was created in 1976,1 when I-680 was rerouted northward from Benicia to Fairfield over the freeway on California State Route 21 to I-80. The freeway mainline dates back to 1962, with the I-80 bridges at the west end built in 1958.