Your 2002 Ria Cinco overheats when you stop like in a drive-through but it's fine once you hit the road What is the cause of this?

Don't know what a "Ria Cinco" is, but from what you describe it seems like your radiator fan might not be comming on. Find the temperature sensor, use a jumper to override it and make certain that the fan turns on. If it doesn't, check the fuses and the fan motor. If the fan works but won't come on when the engine is hot, check the sensor.