California Code, Streets and Highways Code - SHC § 365

(a) Route 99 near Bakersfield to Route 198 near Exeter.

(b) Route 198 near Exeter to Route 80 near Roseville on a route along the easterly side of the San Joaquin Valley, which route may include all or portions of any existing state highway route.

(c) Route 80 near Roseville to Route 70 near Marysville.

(d) Route 70 near Marysville to Route 99 in or near Yuba City.