This probably reminds you of the electric bike, so you might be confused regarding why are electric bikes legal but not scooters? Perfectly, electric scooters can reach higher speeds of around 30km/hour, though the battery needs for being recharged right after a certain distance (between 10 and 40 miles). https://titusfmvbh.blogunok.com/30225263/everything-about-electric-scooter-for-adults-260-lbs-electric-scooter