Congratson finding your new dog! He is gorgeous! ( and I do see the resemblance to Kersey)

I tink the other suggestions on how to exercise him are good. Trying to drive along side him is just too dangerous...too many risks. What about riding with him. There are attachments you get can for a bicycle that keep the dog a safe enough distance away, and break away in case of emergency. Sound slike he is pretty strong, so maybe a little obdience work before the bike would work....