Overriding control of motorized transport unit systems, devices and methods

A system providing control over movement of motorized transport units at a facility, comprising:

• multiple self-propelled motorized transport units configured to move through at least a portion of the facility;
• and a computer system that is separate and distinct from the multiple motorized transport units and configured to wirelessly communicate with each of the multiple motorized transport units, wherein the computer system is configured to:
• identify a first instruction to be executed by a first motorized transport unit of the multiple motorized transport units;
• receive, from a first source, an override command corresponding to the first motorized transport unit of the multiple motorized transport units;
• confirm a valid authorization to override the first instruction intended to be implemented by the first motorized transport unit;
• and
• control the first motorized transport unit by communicating an override communication to the first motorized transport unit, in response to confirming the valid authorization to override the first instruction, to override the first instruction and control the first motorized transport unit to implement one or more override instructions to cause the first motorized transport unit to implement one or more actions in accordance with the override command;
• wherein the computer system is further configured to confirm that the first source of the override command has a higher-level authority based on an override hierarchy over a second source that provided the first instruction when the override command conflicts with the first instruction.