Magic Highway, U.S.A. Segment (1958)
Jeff over at 2719 Hyperion consistently has great analysis of all-things-Disney. Last week he posted the futuristic segment from the 1958 Disneyland TV show, "Magic Highway, U.S.A." Provided it stays up, I recommend checking out the clip because you can't find this program anywhere else.
Update: You can now watch the entire segment at YouTube. Back when I originally wrote this Magic Highway USA was very rare.