The South End of the Warren Freeway

Southern endpoint of the Warren Freeway, California 13 at Interstate 580 in Oakland

Northbound on Interstate 580 in Oakland near Mills College, the Warren Freeway branches off from 580. The older-style button reflectors are clearly in evidence on this sign. It's also fairly unusual in the Bay Area for a freeway name to appear on an exit sign. Even more unusual is the notably different FWY abbreviation. It may be covering up an earlier designation for the route.