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Interstate 580 is the designation for two tertiary interstate highway routes, spurring from Interstate 80.

1 California

Interstate 580 (MacArthur Freeway) in northern California is a heavily traveled, fairly long spur route of Interstate 80 that connects the San Francisco Bay Area to Interstate 5 in the central valleys of the state. The western terminus of I-580 is north of San Francisco in San Rafael, at a junction with U.S. Highway 101. The eastern terminus is with I-5 southeast of Tracy. It was named after General Douglas MacArthur in 1968. Leaving San Rafael, I-580 runs next to the San Quentin State Prison before crossing San Francisco Bay over the Richmond-San Rafael Bridge.

1.1 Major cities and suburbs



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