 The bikes can be lent from, and returned to, any station in the system, making it suitable for one-way travel.Each station has between 15 and 30 parking slots to fix and lock bicycles, but in highly transited areas many stations may be close together.To rent a bike one simply swipes the contactless RFID card at a service station to be personally identified by the system, which then unlocks a bike from the support frame.