Which uses less electrical energy per passenger-km (pkm) travelled?
- Electric bicycle (with a single rider)
- Electric unicycle (aka. self-balancing personal transporter)
I have heard that a standard bicycle and an electric bicycle are both very efficient modes of transportation for an individual. But I haven't heard much about the energy efficiency of self-balancing personal transportation devices. Are they competitive with an electric bicycle?
(I'm also interested in comparing lifecycle energy use, but that might be too much for one question.)