815
Information on State Routes, US Highways, and Interstate Highways in California


315
Information on State Routes, US Highways, and Interstate Highways in California


510
There are 34 routes assigned to the "S" zone of the California Route Marker Program, which designates county routes in California.The "S" zone includes county highways in Imperial, Orange, Riverside, San Diego, and Santa Barbara counties.


870
Route 128 begins at Route 1 near the mouth of the Navarro River at the Pacific Ocean.The highway travels upriver through the coast redwood forests of Navarro River Redwoods State Park and through the vineyards and apple orchards of the Anderson Valley to Boonville.


253
By Christine Robbins. The Journal of San Diego History San Diego History Center Quarterly Winter 2016, Volume 62, Number 1 The Bridges of San Diego County: The Art of Civil Engineering (PDF)