Dymaxion Car - ?
I love the tele-screens, the auto-gyro transports,
and the passenger shuttles on the rail lines, which remind me of
Bucky's Dymaxion Car. http://en.wikipedia.org/wiki/Dymaxion_car
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Actually, the car they showed the most was the then-new Tatra T77. Tatra, a Czech company, is the world's third oldest car company, and had the most advanced cars in the world for quite some time. The T77 which came out in 1933 was arguably the worlds first production streamlined car. Perfect car for this movie.
There were some other non-functional prop cars, trains and mining cars that were pretty cool as well. A couple of them looked like the Dymaxion.
https://en.wikipedia.org/wiki/Tatra_%28company%29
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I'm just a patsy!