directly intersect with I-880 here, so drivers are instructed to get onto I-880 south via Oak Street or I-880 north via Jackson Street. There are two tube entrances on the Oakland side, one on Webster Street, and the other at the intersection of Broadway and 5th Street; the latter can be reached from I-880's Broadway off-ramps. California's legislature has relinquished state control of the segment along Webster Street between Central Avenue and Atlantic Avenue, and thus that portion is now maintained by the City of Alameda. SR 61 is part of the California Freeway and Expressway System, and all three routes are part of the National Highway System, a network of highways that are considered essential to the country's economy, defense, and mobility by the Federal Highway Administration. Major intersections See also References External links California @ AARoads.com - State Route 61 Caltrans: Route 61 road conditions From California Highways: SR 61 SR 112 SR 260 061 State Route 061