System, and east of State Route 70 in Oroville is 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. History In 1915, the Oroville-Quincy Highway was designated as Legislative Route Number 30. This route was abandoned by the state in 1924. In the late 1930s, there was a temporary routing of Alternate US 40 that ran from Davis through Yuba City to Oroville thence to Quincy along Oroville-Quincy Highway, and Bucks Lake Road. From 1965 to 1972, the segment from US 101 to Interstate 5 was defined as route 261. Major intersections See also References External links Route 162 @ California Highways.com Caltrans: Route 162 highway conditions California @ AARoads.com - State Route 162 162 State Route 162 State Route 162 State Route 162 Mendocino National Forest Willows, California Oroville, California Forest Highways in the United States