The powder blue craft shown gliding past the riverfront greenery is our planet’s oldest monorail: the Wuppertal Schwebebahn in Germany, in regular service since 1901. More than 80,000 straphangers ride the 13.3 kilometer route daily. The Schwebebahn suffered one serious accident in 1999, when a train derailed, and a not-particularly-serious accident in 1950, when a…
