Vehicles such as the Citroën Ami, Fiat Topolino or Opel Rocks cannot drive on all city roads because of their low power and the speed limits imposed (45 km/h).
In Rome, for example, you can't drive on a very important road called the 'Tangenziale', or the motorway. This means that using Waze is not an option, as it often sends you to these roads, which are off-limits to small cars.
It would be better if these small vehicles could have other routes so they don't risk getting fined or worse.