stackyFACTSMaintaining a 120-year-old train that dangles upside down over a German river is a logistical nightmare.
Maintaining a 120-year-old train that dangles upside down over a German river is a logistical nightmare. Since you can't just casually stroll on the track, the Wuppertal Schwebebahn uses a custom-built, remote-controlled inspection car that crawls along the top of the rail system. It scours the massive steel beams for microscopic cracks using ultrasonic sensors, acting as a mechanical doctor performing a high-altitude colonoscopy on one of the world's strangest transit networks.
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