Interstate 580 is an 80-mile east–west Interstate Highway in Northern California. The heavily traveled spur route of Interstate 80 runs from San Rafael in the San Francisco Bay Area to Interstate 5 near Tracy in the Central Valley. It provides a connection from the Bay Area to the southern San Joaquin Valley and Southern California via Interstate 5, as Interstate 5 bypasses the Bay Area to the east.A portion of I-580 is called the MacArthur Freeway, after General Douglas MacArthur. Other portions are named the John T. Knox Freeway, the Eastshore Freeway, the Arthur H. Breed Jr. Freeway, the William Elton "Brownie" Brown Freeway, the Sgt. Daniel Sakai Memorial Highway, and the John P. Miller Memorial Highway .
