Here (not France) you can drive an EU moped (45km/h) on a car license, which could (and should!) be a great alternative to a smaller car. The problem is that it's difficult to get to and through the city without touching the highways, which are strictly off limits for the mopeds for obvious reasons.
What's needed is something in between a full sized MC and a moped that can be driven on a car license and that can reach at least 80km/h to keep up with inner city highway speeds.