The Operating Poultry Dispatch Car No. 3434 upon activation by the use of a UCS or 6019 control track section would open the door and the sweeper would clean the inside of the car.

This operating car has three variations that have to do with the color of the sweeper and the trucks. When first released in 1959, the center rail electric pick-up rollers were not perfected for the AAR trucks, so early versions of this car had bar-end trucks with tabbed couplers. Produced in 1959 and 1960, and again in 1964-66, these later versions had AAR trucks with disc couplers (Variation C).