The Segway PT is a personal transporter, according to the local Spanish regulations, it is assimilated to a bicycle.
Using electric scooters up to 300 Watt with a maximum speed up to 25 km/h we go in a category of bicycle transport too. You do not need a driving license to use them. But to drive a scooter as a bike in Spain, you must follow the rules and not drink alcohol or use drugs before or during the ride.