Dogs Unite

Anybody have any good training ideas for dogs that run away? I like this trainer on youtube called ”kikidog”, but her techniques for this particular issue aren’t working. It makes it miserable to take him on walks. My dog should be called ”flash gordon” because he runs at lightening speed – I’ve never seen a dog go this fast. I have to admit it’s humorous but I’m afraid he’s going to be hit by a car.