After the WW2, cheap commercial cars were in demand in Europe, so Italy had small pickups or vans such as Piaggio Ape or Innocenti Lambro that are based on Vesp

After the WW2, cheap commercial cars were in demand in Europe, so Italy had small pickups or vans such as Piaggio Ape or Innocenti Lambro that are based on Vespa and Lambretta scooters (which happen to be initially designed by the same guy). You can see lots of them in 50s Italian movies. Updated models are still sold or produced in India. Later on, microcars are pretty much scooters or bikes with cabs. These days, some ultra-lightweight sports cars such as Polaris Slingshot may be registered as motorcycles due to having practically no safety features expected from a car (in the US, there's also an ‘autocycle’ option for three-wheeled vehicles).