A method for preventing drive off of a refrigerated transport unit, the refrigerated transport unit including a transport unit having an internal space for storing cargo and a transport climate control system to control an environmental condition of the internal space, the method comprising: detecting whether an electrical power system of the refrigerated transport unit is electrically connected to a utility power source, the electrical power system configured to provide power to the transport climate control system; performing an action when the electrical power system is electrically connected to the utility power source, including: generating, when the electrical power system is electrically connected to the utility power source, an instruction to prevent movement of the refrigerated transport unit while the electrical power system is electrically connected to the utility power source; the method characterised by at least one of: - wherein detecting whether the electrical power system of the refrigerated transport unit is electrically connected to the utility power source includes sensing for a physical connection between a socket of the electrical power system of the refrigerated transport unit and an external electrical cord for the utility power source; and/or - the method further comprises: communicating the instruction to a docking port including an attachment arm for physically restraining the transport unit, and preventing, based on the instruction to prevent movement of the refrigerated transport unit, the attachment arm from being disengaged from the transport unit while the electrical power system is electrically connected to the utility power source; and/or - the method further comprises: communicating the instruction from the refrigerated transport unit to a second refrigerated transport unit; and preventing movement of the refrigerated transport unit and the second refrigerated transport unit with the instruction to prevent movement of the refrigerated transport unit. detecting whether an electrical power system of the refrigerated transport unit is electrically connected to a utility power source, the electrical power system configured to provide power to the transport climate control system; performing an action when the electrical power system is electrically connected to the utility power source, including: generating, when the electrical power system is electrically connected to the utility power source, an instruction to prevent movement of the refrigerated transport unit while the electrical power system is electrically connected to the utility power source; the method characterised by at least one of: - wherein detecting whether the electrical power system of the refrigerated transport unit is electrically connected to the utility power source includes sensing for a physical connection between a socket of the electrical power system of the refrigerated transport unit and an external electrical cord for the utility power source; and/or - the method further comprises: communicating the instruction to a docking port including an attachment arm for physically restraining the transport unit, and preventing, based on the instruction to prevent movement of the refrigerated transport unit, the attachment arm from being disengaged from the transport unit while the electrical power system is electrically connected to the utility power source; and/or - the method further comprises: communicating the instruction from the refrigerated transport unit to a second refrigerated transport unit; and preventing movement of the refrigerated transport unit and the second refrigerated transport unit with the instruction to prevent movement of the refrigerated transport unit. - wherein detecting whether the electrical power system of the refrigerated transport unit is electrically connected to the utility power source includes sensing for a physical connection between a socket of the electrical power system of the refrigerated transport unit and an external electrical cord for the utility power source; and/or - the method further comprises: communicating the instruction to a docking port including an attachment arm for physically restraining the transport unit, and preventing, based on the instruction to prevent movement of the refrigerated transport unit, the attachment arm from being disengaged from the transport unit while the electrical power system is electrically connected to the utility power source; and/or communicating the instruction to a docking port including an attachment arm for physically restraining the transport unit, and preventing, based on the instruction to prevent movement of the refrigerated transport unit, the attachment arm from being disengaged from the transport unit while the electrical power system is electrically connected to the utility power source; and/or - the method further comprises: communicating the instruction from the refrigerated transport unit to a second refrigerated transport unit; and preventing movement of the refrigerated transport unit and the second refrigerated transport unit with the instruction to prevent movement of the refrigerated transport unit. communicating the instruction from the refrigerated transport unit to a second refrigerated transport unit; and preventing movement of the refrigerated transport unit and the second refrigerated transport unit with the instruction to prevent movement of the refrigerated transport unit.