This consists of all transport which runs exclusively or principally on roads. ‘Roads’ include all forms of thoroughfare ranging from a track or path to a motorway, as well as associated infrastructure (bridges, cuttings, tunnels, parking areas, footways, etc). However, it excludes ground activities in ports and airports which are directly associated with the functioning of air, maritime or inland waterway transport. Guided vehicles are included if they have the capacity to run on normal roads as well, e.g. guided buses can be counted as road, but not trams (as these are rail based, even if the rails run along a road). Non-motorised modes, including walking and cycling, are also included here as, for the most part, they share the same infrastructure.