I retired from the railroad. Debbie and I use railroad train movement (lamp) hand signals, if dark with flashlight, for backing, move forward, and stop. If more than one person tries to give signals or person giving signals is out of sight, the Ollie movement stops.
We don't worry about air brake application, hand brake application, and release air brake signals! 😁
Thanks for the tip! My wife and I will be practicing the hand signals routine before our pick up date next month.