M4 Motorway

Route: The southern east-west motorway linking London (Chiswick) to Bristol and on to South Wales, terminating just beyond Pontarddulais.
Cities: Aberkenfig, Acton Turville, Bray Court, Brinkworth, Castleton, Christchurch, Englefield, Fforest, Hambrook, Hensol, Hermitage, Hinton, Hungerford Newton, Hurst, Kew, Liddington, Llandarcy, Lydiard Tregoze, Magor, Morriston, North Cornelly, Pencoed, Pilning, Rhiwbina, Shinfield, Slough, Sutton Benger, Harmondsworth, Portskewett.