The former route of US 40 in California generally runs parallel to modern Interstate 80. In Contra Costa County it is San Pablo Avenue, now signed as California State Route 123. Portions of Historic Route 40 exist in American Canyon, Vallejo, along 5th Street, Alameda Street and Broadway. In Cordelia and Suisun City, the original route is along Cordelia Road. It is also signed as a historic route. The original route is preserved as Texas Street in Fairfield. In Vacaville the highway is preserved as Monte Vista Avenue. In Davis, the highway is now Russell Boulevard, the main street through downtown Davis. In Sacramento the highway followed the routes of modern Capitol Avenue, SR 160 and Auburn Boulevard. Between Roseville and Newcastle, the highway is known as Taylor Road and Pacific Street through Rocklin. Through the Sierra Nevada many portions are still drivable, crossing I-80. Portions still drivable include Applegate Road in Applegate, Hampshire Rocks Road in a rural area near Cisco, and Donner Pass Road over Donner Pass and into Truckee. Between Truckee and the Nevada state line, the former route of US 40 is mostly visible from the freeway, but not drivable as a contiguous route. Portions accessible include Glenshire Drive, Hirshdale Road and Floriston Way.