I pulled out of my driveway and drove up my street. there was a car sitting there watching my house. it was black, mid 60's, 4-door galaxy. i'm a classical car guy, so i know my cars well. i have attached some pictures of the kind of car it was. the windows were solid black and i could not see in them at all. the license plate was solid white with black trim and no numbers on it at all. when it saw me coming toward it, it took off. i turned left and went up a few blocks and there was the car again waiting for me. when i passed it, it started following me. it followed me for a couple of miles and got right on me to the point i braked to get him off me. i was watching him in my rear view mirror back off and then i checked my speedometer for a fraction of a second to check my speed. i looked back in my mirror and the car was gone. it vanished into thin air. this was on a strip of the highway with no exits. there were no other cars around. it was impossible to get off that road let alone in a fraction of a second. i pulled over and got out of my car and looked around. i could view a long ways and the car was no where to be seen. this is a situation that i can not find any explanation for other than what i think it was. i will keep my eyes open for anything else.