Yes, you can shut it off after 10-20 seconds of idling, and yes, you can start driving after 10-20 seconds of idling. Unless you are being chased by a ax murderer, or a woman who you dont know who says that you are the father of her unborn child.

 

Ok spike Thanks.
I do need to shut down the engine ASAP at times when I reach the hospital for an emergency call
I'll add the 2 you've mentioned on my list.
Cheers.