These vehicles allow for spontaneous travel and are being used for journeys of up to about 4 km which are made under favourable weather conditions (OECD, 2001). The question is, however, whether given infrastructure is suitable for the safe use of such modes of transport, how given infrastructure should be used by these vehicles and how it should, or could, be adapted. A family of services which enables travellers to select the one that best suits their requirements for a particular journey is needed.