On: Electric Velomobiles: fast, comfortable, and more ...

[bergie]

Cleaner and cheaper power source. Moped cars (which I assume you meant) are quite popular in Europe for rural 16-18 old kids, as they can't drive regular cars yet:

http://www.bbc.co.uk/newsbeat/20451602

[amalag → bergie]

I meant a two wheeled motorized bicycle. Some have been around since WWII http://en.wikipedia.org/wiki/V%C3%A9loSoleX

The laws vary state to state in US. No car likes being stuck behind a low powered slow moped though.