Every school bus used for the transportation of schoolchildren shall bear upon the front and rear thereof plainly visible signs containing the words "School Bus" in letters not less than eight inches (8") in height and, in addition, shall be equipped with visual signals meeting the requirements of 47 Oklahoma Statutes section 12-218, which shall be actuated by the driver of the school bus whenever such vehicle is stopped on the highway for the purpose of receiving or discharging schoolchildren. (2001 Code § 71.106; amd. 2012 Code)