Officers of the Sheriff's Department are authorized to direct all traffic by voice, hand or signal in conference with traffic laws; provided, that in the event of fire or other emergency, Sheriff's officers may direct traffic as conditions may require, notwithstanding provisions of traffic laws. No person shall refuse or fail to comply with any lawful order, signal or direction of any Sheriff's officer of the County. (1973 Code §§11.040.020, 11.04.030; 1991 Code)