301.40  STOPPING OR STANDING.
   (a)   "Stop or stopping" when prohibited means any halting of a vehicle, even momentarily, whether occupied or not, except when necessary to avoid conflict with other traffic or in compliance with the directions of a police officer or traffic control device.
   (b)   "Stand or standing" means the halting of a vehicle, whether occupied or not, otherwise then temporarily for the purpose of and while actually engaged in receiving or discharging passengers.