U.S. Route 101
U.S. Route 101, or U.S. Highway 101 (US 101) is a north–south United States Numbered Highway that runs through the states of California, Oregon, and Washington, on the West Coast of the United States. It is also known as (The Royal Road) where its route along the southern and central California coast approximates the old trail which linked the Spanish missions, pueblos, and presidios. It merges at some points with California State Route 1 (SR 1).
Gaviota Tunnel
The Gaviota Tunnel (officially known as the Gaviota Gorge Tunnel) is a tunnel on U.S. Route 101 (US 101, most portions between San Francisco and Los Angeles follow the old El Camino Real) completed in 1953 in the center of Gaviota State Park, northwest of Santa Barbara, California. It is long and tall. Only the northbound lanes of US 101 pass through it, as the southbound lanes descend from Gaviota Pass through a narrow canyon to the west of the tunnel. Because it is the only major route between the Santa Barbara County South Coast and the Santa Ynez Valley, bicycles are allowed through it. There is a rest area for both southbound and northbound lanes on the southern end of the tunnel, the southernmost one along U.S. Route 101.