Police officers are authorized to direct all traffic by voice, hand or signal in conformance with traffic laws of the City of Los Angeles and the State of California provided that in the event of a fire or other emergency they may direct traffic as conditions may require notwithstanding the provisions of these regulations. No persons shall willfully fail or refuse to comply with any lawful order, direction or signal of a police officer.
Cal. Code Regs. Tit. 2, § 5050