Metropolis II, on display now at the LA County Museum of Art, features a futuristic model of Los Angeles in which cars and trains zip around super-efficiently (and, reportedly, loudly).
"'Metropolis II'...has 'an elaborate system of 18 roadways, including one 6 lane freeway, and HO scale train tracks,' according to LACMA. 1,100 custom-made Hot Wheels-style cars zoom around erector set and LEGO buildings at a scale speed of about 240 mph--they're pulled up a conveyor belt by a magnet, then ride gravity through the Teflon-covered course (the trains are "out of the box electric train sets," according to the museum's Unframed blog. LACMA built a catwalk around the room for Eagle eye viewing, and put up a couple of walls that help buffer the sound."
FULL STORY: See and Hear LACMA's Zippy New Mini-City "Metropolis II"

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