I failed to mention that the radiator and thermostat were both replaced last summer. It could be the thermoswitch, I don't recall if that was replaced at the time.

Just like to mention that I'm not completely lost, I understand the concept of the air moving over the engine and cooling it when the car is moving again. What I find baffling is that usually when a car overheats and you move and the engine begins to cool the guage descends gradually. In my case the needle falls quickly after moving a short distance after sitting.

Regardless I won't be driving again until after it has bee repaired. I don't need any additional problems.

Thanks again for these and any other suggestions.