Section 466 Of Article 3. The State Highway Routes From California Streets And Highways Code >> Division 1. >> Chapter 2. >> Article 3.

. Route 166 is from:
  (a) Route 1 near Guadalupe to Route 101 in Santa Maria.
  (b) Route 101 near Santa Maria to Route 33 in Cuyama Valley.
  (c) Route 33 near Maricopa easterly to Route 99.