Originally Posted by gore-tx
Yes because you don't need a motorcycle license to ride them. You just need a regular driver's license.
Gore-tx is right. Three wheel scooters are exploiting a loop hole in French laws that allow them to be ridden without any of the licensing required for regular two wheeled scooters. I think most would agree the danger is pretty much the same, as are the required skills.
Much like the US where 50cc and under in most places do not require a valid drivers license, thus driving up sales.
So my take on it is that the primary force being the poplularity is simply that they can be ridden without the rules imposed that others have.
Pretty interesting stuff.