(a) At all pick-up points where it is necessary for a school bus passenger to cross the roadway to board the bus, the school bus driver shall signal the awaiting passenger when it is safe to cross the roadway ahead of the bus.
     (b) At all discharge points where it is necessary for a school bus passenger to cross the roadway, the school bus driver shall direct the passenger to a point approximately 10 feet in front of the bus on the shoulder and shall then signal the passenger when it is safe to cross the roadway.