It is unlawful for any person driving or operating, propelling or causing to be propelled, any vehicle to fail to stop at a limit line placed in advance of a school pedestrian lane where any signal, flagman or person is stationed giving warning that children are about to cross or are crossing the street; it is unlawful to proceed until such signal has stopped, raised or been removed, or the flagman or the person stationed at such pedestrian lane has given a signal to go or has left the locality. (Ord. 2670, 1996; Ord. 973 § 1, 1966; prior code § 19.20.2).