Some embodiments provide methods, systems and apparatus to enhance safety. In some embodiments, a system comprises: a central computer system comprising: a transceiver; a control circuit; and a memory coupled to the control circuit and storing computer instructions that when executed by the control circuit cause the control circuit to perform the steps of: communicate positioning routing instructions to the plurality of motorized transport units directing the motorized transport units to one or more external areas of a shopping facility that are exposed to weather conditions; and communicate separate area routing instructions to each of the motorized transport units that when implemented cause the motorized transport units to cooperatively and in concert travel in accordance with the area routing instructions over at least predefined portions of one or more external areas to cause ground treatment systems to address ground level conditions.