Tuk-tuks and human powered rickshaws are making their way to the western world. Three wheelers were common in Europe when I was a kid, but somehow they have disappeared where I lived. They never went out of fashion in France and Italy though, where they still make their own brands. Two at the back or two at the front, doesn’t matter – here we go again.
Véléance, Electric Vehicles: http://www.veleance.fr/
About Piaggio APE: http://en.wikipedia.org/wiki/Piaggio_Ape
About the Tuk-Tuk: http://en.wikipedia.org/wiki/Tuk_tuk