The driver of a vehicle upon a street or highway,
upon meeting or overtaking from either direction a school bus marked
and equipped as provided in the Vehicle and Traffic Law of the State
of New York which has stopped on the highway for the purpose of receiving
or discharging school children, shall stop the vehicle before reaching
such school bus when there is in operation on said school bus a visual
signal as specified in the Vehicle and Traffic Law of the State of
New York, and said driver shall not proceed until such school bus
resumes motion or until signaled by the driver or a police officer
to proceed.