M4

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J1 - Chiswick / Hammersmith


J2 - Brentford / Ealing


J3 - Feltham / Southall / Harrow


J4 - Heathrow Airport / Uxbridge


J4B - M25 J15 / Heathrow Airport (W)


J5 - Slough(E) / Heathrow Airport(W)


J6 - Slough (C) / Windsor


J7 - Slough (W) / High Wycombe


J8|9 - Maidenhead / High Wycombe


J10 - A329(M) / Bracknell / Reading


J11 - Reading (S)


J12 - Reading (W)


J13 - Newbury / Oxford


J14 - Hungerford / Wantage


J15 - Swindon (E) / Marlborough


J16 - Swindon (W)


J17 - Chippenham / Cirencester


J18 - Bath


J19 - M32 Junct 1 / Bristol (N)


J20 - M5 / Bristol Filton Airport


J21 - Start of M48 / Chepstow


J22 - Start of M49 / Avonmouth


J23 - Caldicot / Chepstow