How to protect my driveway

Looking for suggestions on how to stop these delivery drivers from turning around on my driveway. A full gate is too expensive and i do not want to stop and get out to open/close it all the time.

I would put one of those one way tire flattening devices but then i will end up driving over it! Frankly, had i though of this before i would have left it as gravel.
Author: mdh157