The owners or managers operating any streetcar line failing to comply with the provisions of RCW 81.64.120 shall forfeit and pay to the state of Washington a penalty of not less than twenty-five dollars for each and every violation of RCW 81.64.120 and each car run shall be considered a separate violation of RCW 81.64.120 and every period of five days shall be deemed a separate violation of RCW 81.64.120.