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London-South Wales Motorway / Traffordd Llundain-De Cymru

London - Pont Abraham

  Lanes   Exit Direction London (Read Up) Direction Pont Abraham (Read down) Slip road Notes _Also_as_
        Central London A4    
      1   North & South Circular (A406, A205) A4 A4    
      2 North & South Circular (A406, A205) A4, Chiswick A315 Staines, Hounslow A4 A4    
    Heston services Heston services      
  3 Harrow, Hayes A312, Hounslow, Heathrow Airport Heathrow Airport (T4 & Cargo), Hayes, Feltham A312 A312    
  4A Uxbridge, Heathrow Airport (T1, T2 & T3) A408 Heathrow Airport (T1, T2 & T3), Uxbridge (A408) A408    
  4B M25 N (M40, M1) Oxford, Watford - M25 S (M3, M23) Heathrow (T4, T5 & Cargo), Gatwick M25 N (M40, M1) Oxford, Watford - M25 S (M3, M23) Heathrow (T5), Gatwick M25 E30 Go to M25  
  5 Colnbrook, Langley A4, Eton, Datchet B470 Colnbrook, Langley A4, Datchet B470 A4 B470   E30
  6 Slough (Central) A355, Windsor (A332) A355   E30
  7 Slough (West) A4 A4   E30
    Thames Bridge     E30
  8/9 High Wycombe A404(M), Maidenhead A308(M) High Wycombe, Henley A404(M), Maidenhead A308(M) A308(M) A404(M) Go to A308(M), Go to A404(M) E30
  10 Reading (East) A329(M) - Wokingham, Bracknell A329(M) A329(M) Go to A329(M) E30
  11 Reading (Central & South), Basingstoke A33 A33 B3270   E30
    Reading services Reading services     E30
  12 Theale, Reading (West) A4 A4   E30
  13 Oxford A34 - Newbury A34, Chieveley services A34 E05 Go to A34 E30
      A34 E05   E30
  14 Hungerford, Wantage A338 A338   E30
    Membury services Membury services     E30
  15 Marlborough A346, Swindon (East) A419, Oxford (A420) Marlborough A346, Swindon A419 A419 A346 Go to A419 E30
  16 Swindon (West), Wootton Bassett, RAF Lyneham, Calne A3102 A3102 B4005   E30
  17 Chippenham A350, Cirencester A429 A350 A429 B4122   E30
    Leigh Delamere services Leigh Delamere services     E30
  18 Bath, Stroud A46 A46   E30
  19 Bristol M32, Ring Road (A4174) Bristol M32 M32 Go to M32 E30
      20 The MIDLANDS M5 - The SOUTH WEST, Bristol (West) & Airport M5 The MIDLANDS, Gloucester M5 - The SOUTH WEST, Bristol (West) M5 M5 Go to M5 E30
          E30
      21   Chepstow & Services M48 M48 Go to M48 E30
      22 The SOUTH WEST, Avonmouth M49 Avonmouth M49 M49 Go to M49 E30
    Second Severn Crossing/Ail Groesfan Hafren 5128m     E30
        Second Severn Crossing Toll
Tollau
Ail Groesfan Hafren
  Toll station E30
  23 Chepstow/Cas-gwent & Services/Gwasanaethau   M48 Go to M48 E30
  23A Magor/Magwyr, Caldicot B4245, Magor Services/Gwasanaethau'r Magwyr B4245   E30
  24 The MIDLANDS/Canolbarth Lloegr (M50), Monmouth/Trefynwy A449, Newport/Casnewydd A48 Newport (E)/Casnewydd (Dn) A48, Monmouth/Trefynwy A449 A449 A48 B4237 Go to A449 E30
  25   Caerleon B4596 B4956   E30
  25A   Newport/Casnewydd, Cwmbran A4042 A4042   E30
    Twnnel Brynglas Tunnel 362m (1200ft) Twnnel Brynglas Tunnel 362m (1200ft)     E30
  26 Cwmbran, Newport/Casnewydd, Caerleon A4051 Newport/Casnewydd A4051 A4051   E30
  27 High Cross B4591 B4591   E30
  28 Newport/Casnewydd A48, Risca, Brynmawr A467 A48 A467   E30
  29   Cardiff (E & S)/Caerdydd (Dn a D) A48(M) A48(M) Go to A48(M) E30
  30 Cardiff (E)/Caerdydd (Dn) A4232, Cardiff Gate services/Gwasanaethau'r Porth Caerdydd A4232   E30
  32 Merthyr Tydfil A470 - Cardiff (N)/Caerdydd (G) A470 A470 A4054 Go to A470 E30
  33 Cardiff West/Gorllewin Caerdydd, Barry/Barri, Penarth A4232, Airport/Maes Awyr
Cardiff West services
/Gwasanaethau Gorllewin Caerdydd
A4232 Go to A4232 E30
          E30
  34 Llantrisant, Rhondda A4119 A4119   E30
  35 Pen-coed A473 Bridgend/Pen-y-bont, Pen-coed A473 A473   E30
  36 Bridgend/Pen-y-bont A4061, Maesteg A4063, Gwasanaethau Sarn Park services, Designer Outlet Village/Pentref Manwerthu A4061 A4063   E30
  37 Porthcawl, Pyle/PÓl A4229 A4229   E30
      38 Port Talbot A48 A48   E30
      39   A48 On-ramp E30
      40 Port Talbot A4107 A4107   E30
      41 Port Talbot A48   A48 B4286   E30
          E30
      41   Briton Ferry/Llansawel     E30
        Pont Briton Ferry Bridge     E30
      42   Swansea/Abertawe A483 A483   E30
      42 Briton Ferry/Llansawel A48, Swansea/Abertawe A483   A48 A483   E30
          E30
      43 Neath/Castell-nedd, Merthyr Tydfil A465 A465 B4290 Go to A465 E30
      44 Swansea (East)/Abertawe (Dwyrain) A48 A48 A4230   E30
      45 Pontardawe, Swansea (N)/Abertawe (G) A4067 A4067 B4603   E30
      46 Llangyfelach B4489, Felindre A48 B4489   E30
      47 Swansea (W)/Abertawe (Gn) A483, Gorseinon A48
Swansea West services/Gwasanaethau Gorllewin Abertawe
A48 A483   E30
      48 Pontarddulais, Llanelli A4138 A4138   E30
      49   Gwasanaethau Pont Abraham services - Carmarthen/Caerfyrddin A48 - Llandeilo A483 - Pontarddulais A48 A48 E30 A483    

Legend, Road signs
See also: Wikipedia - M4 motorway, CBRD - Motorway Database - M4

Page was last modified on 15 March 2010