Metropolis II
Beautiful short documentary on art installation Metropolis II, which features 1,200 custom-made matchbox cars in a city-like environment. My son is going to love this...
Burden and Cook added some clever design solutions to control the traffic flow and minimize catastrophes. The subtlest, says Burden, are lane-dividing medians on the tiny roadways that taper to a point from the bottom to the top edge on straightaways, but remain fully vertical in curves. The reason: braking. When the cars enter a curve, the walls of the medians touch with rims of their wheels and the friction slows them down; when they come out of the curve, the tapered medians don't touch the wheel rims anymore, allowing the cars to pick up speed again on straightaways and keep the flow moving swiftly. When they reach the bottom, magnets in the track catch on and pull them back up a slope to the top like a roller coaster, where they are released once again to gravity's pull.
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