article: M4 motorway
links: Datchet Bracknell Bristol Airport Oxford Gloucestershire Heathrow Airport M48 motorway M50 motorway (Great Britain) Carmarthen Windsor, Berkshire M49 motorway Second Severn Crossing Bath, Somerset M3 motorway (Great Britain) Cwmbran Rhondda Eton, Berkshire Central London Royal Wootton Bassett Newport, Wales Cirencester Bridgend Harrow, London Monmouthshire Highways England Watford Hungerford London South Wales Basingstoke Wokingham M5 motorway Henley-on-Thames Caerleon Wales Gatwick Airport Gloucester Ammanford Port Talbot Uxbridge Reading, Berkshire Berkshire Llanelli Greater London Merthyr Tydfil Cardiff Airport A406 road Cardiff Wantage Chepstow Newbury, Berkshire High Wycombe Monmouth Google M32 motorway Swansea London Heathrow Airport Maidenhead Wiltshire M40 motorway Slough Calne Chiswick M25 motorway A48(M) motorway United Kingdom Bristol Swindon Marlborough, Wiltshire Carmarthenshire