The Mono-rail Track Velocipede wasn't as flashy as a jet pack, but maybe it was more practical—as long as you had what Scientific American called in May 1900 a "single-rail railway" to use it on, of course. The lucky people of Wuppertal, Germany, have been using just such a suspension monorail since 1901. The Schwebebahn transports 70,000-80,000 passengers a day—alas, in two-car trains, not on individual velocipedes. Click through for a full look at the cutting-edge, bicycle-esque monorail technology of 1900.

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