this just in from kevin:

http://www.space.com/businesstechnology/070122_technov_nasa_bike.html

this may be an engineering marvel, but it's completely divorced from reality.  this might play on the salt flats somewhere, but seriously, where could you use this thing?  the wheels are 1.62 meters ** apart at their base.  given that most travel lanes of roads are around 3 meters wide, you'll be taking up more than half the lane.  and can you imagine something like this on the capital crescent or wo&d?  it may be a neat idea, but where would one use something like this.  oh, forget it, let's just assume you had a place to use it that was ideal.  where will you store it?  yee gods, this is impractical...

- - - sg

** the union prefers systeme internationale!