A/C Issues STILL ONGOING

I do not think that the voltage is a problem. Some things come to mind. If everyone thought that system was low on refrigerant and added some, an over charged system can shut down due to high pressure. Could be that pressure switch is bad and causing system to shut down, when in traffic and lower air flow would cause pressure in system to rise. Not sure of his one, but when in traffic, temperature of engine will rise. Possibly since AC running at the time could cause computer in vehicle to shut down AC to "save engine" from over heating, due to extra heat proceeded by AC system.

Has anyone tried connecting a computer to OBD port, and road testing the vehicle under the conditions that you describe? This could possibly help to view system pressures and temperatures to see if they are normal, or excessive.