CA Veh Code Section 21207

(a)

This chapter does not prohibit local authorities from establishing, by ordinance or resolution, bicycle lanes separated from any vehicular lanes upon highways, other than state highways as defined in Section 24 of the Streets and Highways Code and county highways established pursuant to Article 5 (commencing with Section 1720) of Chapter 9 of Division 2 of the Streets and Highways Code.

(b)

Bicycle lanes established pursuant to this section shall be constructed in compliance with Section 891 of the Streets and Highways Code.