than Greater Boston, the Washington Metropolitan Area and the San Francisco Bay Area. (American metros average .613 lane-miles per thousand.) San Diego ranked 17th in the same study, with 0.659 lane-miles per thousand, and the Inland Empire ranked 21st, with 0.626. Limited-access roads not maintained by the state The following limited-access roads are not maintained by the state: Colorado Street, former routing of State Route 134, from Interstate 5 to San Fernando Road just west of Glendale Colorado Freeway, former routing of State Route 134, from Colorado Blvd in Eagle Rock to the Ventura Freeway Harbor Scenic Drive from Interstate 710 at Ocean Boulevard to Jamboree Road in Irvine, a non-tolled extension of State Route 261 from Walnut Avenue near Interstate 5 to Barranca Parkway Oak Grove Drive in Pasadena, former routing of the Foothill Freeway Shoreline Drive in Long Beach, the downtown exit from southbound Interstate 710 to Queens Way La Cienega Boulevard in the Baldwin Hills, originally intended to be part of the discontinued Laurel Canyon Freeway Los Patrones Parkway in Las Flores, a non-tolled extension of State Route 241 from Oso Parkway to Cow Camp Road List of freeways Major freeways leading into and out of Southern California Interstate 5 south terminus at San Ysidro in San Diego, northbound to the Central Valley and Sacramento John J. Montgomery Freeway from the U.S.-Mexico border crossing at San Ysidro to Downtown San Diego San Diego Freeway from Downtown San Diego to the El Toro Y Santa Ana Freeway from the El Toro Y to the East L.A. Interchange Golden State Freeway from the East L.A. Interchange to Wheeler Ridge Interstate 8 west terminus in Ocean Beach in San Diego, eastbound to the Arizona State Line towards Yuma Ocean Beach Freeway from Ocean Beach to Old Town Mission Valley Freeway, also known as the Alvarado Freeway, from Old Town to El Cajon Kumeyaay Highway from Ocean Beach to the San Diego-Imperial County Line as well as El Centro and Imperial Interstate 10 west terminus in Santa Monica, eastbound to the Arizona State Line towards Phoenix Santa Monica Freeway from Santa Monica to the East L.A. Interchange San Bernardino Freeway from the East L.A. Interchange to San Bernardino Interstate 15 south terminus in Barrio Logan in San Diego, northbound to the Nevada State Line towards Las Vegas Wabash Freeway (signed as State Route 15) from Barrio Logan in San Diego to