If you can catch them at it a quick squirt with a water pistol might do the trick. If not there are pellets but I would imagine it would cost too much to cover the whole driveway.
I had the same problem in my gravel garden. I bought some lemon pellets from a garden centre for deterring cats and placed little piles hidden in the corners and it seemed to of stopped them just had to replace piles every few months.
The bucket cost �5 and lasted about 6 months