Fans of this stuff might also appreciate this book (Amazon.com link) by New Yorker artist and writer, Bruce McCall. It appears to be out of print, but I have seen copies at local bookstores. His stuff I love because you can look and look and look and still find something new and funny.
Right on, Shotsy-- I've dug McCall's work since his Lampoon days, and I find him the only artist who singlehandedly predicted the futurist "biggerisbetter" ethos in cars (the SUV), versus the relatively earnest and socialist Radebaugh (lotsa mass transit).
I dig BelGeddes designs too (very dashing and graphitey), but for sheer Jet Packiness, my money is on Radebaugh...
An online exhibit from New York's James Goodman gallery
An interesting background article by Robert Fulford