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Exit List

All the junctions and destinations along the route.

Junction	Eastbound				Westbound
1	N/A	A315 A406	EAST A4	A205	N/A
	1 mile, 3 lanes				1 mile, 2 lanes
2	North Circular Road A406 South Circular Road A205 Chiswick A315			A4	Staines Hounslow A4
	1 mile, 2 lanes				1 mile, 2 lanes

	3 miles, 2+1 lanes				3 miles, 3 lanes
	Heston				Heston
	1 mile, 2+1 lanes				1 mile, 2 lanes
3	Feltham A312 Hounslow (A3006)	A312		A312	Heathrow T4 & Cargo Feltham Hayes A312
	2 miles, 3 lanes				2 miles, 3 lanes
4	Uxbridge Hayes Heathrow T1, 2 & 3	(A408)			Heathrow T1, 2 & 3 Uxbridge (A408)
	2 miles, 3 lanes				2 miles, 4 lanes
4B	Watford (M1 ) Birmingham (M40 ) Heathrow T4 & Cargo Gatwick (M23 ) Winchester (M3 ) M25	M25		M25	Heathrow T4 & Cargo Gatwick (M23 ) Watford (M1 ) Birmingham (M40 ) M25
	2 miles, 3 lanes				2 miles, 4 lanes
5	Langley (B470) Staines (A3044) A4	A4		A4 (A3044) B470	The SOUTH WEST (M3 ) Langley A4 Eton B470
	4 miles, 3 lanes				4 miles, 3 lanes
6	Slough (C) A335 Windsor (A332)	A355		A355	Slough (C) A355 Windsor (A332)
	2 miles, 3 lanes				2 miles, 3 lanes
7	Slough (W) A4	(A4)			Slough (W) A4
	2 miles, 3 lanes				2 miles, 3 lanes
	Thames				Thames
	2 miles, 3 lanes				2 miles, 3 lanes
8/9	High Wycombe A404(M) Maidenhead A308(M)	A308(M) A404(M)			High Wycombe Henley A404(M) Maidenhead A308(M)
	7 miles, 3 lanes				7 miles, 3 lanes
10	Reading (E) Wokingham Bracknell A329(M)	A329(M)		A329(M)	Reading (E) Wokingham Bracknell A329(M)
	6 miles, 3 lanes				6 miles, 3 lanes
11	Reading (C & S) Basingstoke A33	B3270 A33		A33	Reading (C & S) Basingstoke A33
	3 miles, 3 lanes				3 miles, 3 lanes
	Reading				Reading
	2 miles, 3 lanes				2 miles, 3 lanes
12	Theale Reading (W) A4	A4		A4	Theale Reading (W) A4
	12 miles, 3 lanes				12 miles, 3 lanes
13	Newbury Oxford A34 Chieveley	A34		A34	Newbury Oxford A34 Chieveley
	8 miles, 3 lanes				8 miles, 3 lanes
14	Hungerford Wantage A338	A338		A338	Hungerford Wantage A338
	4 miles, 3 lanes				4 miles, 3 lanes
	Membury				Membury
	8 miles, 3 lanes				8 miles, 3 lanes
15	Marlborough A346 Swindon (E) A419 Oxford (A420)	A419 (A420)		A346	Marlborough A346 Swindon A419
	6 miles, 3 lanes				6 miles, 3 lanes
16	Swindon (W) Wootton Bassett RAF Lyneham Calne A3102	A3102		B4005 A3102	Swindon (W) Wootton Bassett RAF Lyneham Calne A3102
	12 miles, 3 lanes				12 mile, 3 lanes
17	Cirencester A429 Chippenham A350	A429		B4122 A350	Chippenham A350 Cirencester A429
	2 miles, 3 lanes				2 miles, 3 lanes
	Leigh Delamere				Leigh Delamere
	9 miles, 3 lanes				9 miles, 3 lanes
18	Bath Stroud A46	A46		A46	Bath Stroud A46
	7 miles, 3 lanes				7 miles, 3 lanes
19	Bristol M32			M32	Bristol M32
	3 miles, 3 lanes				3 miles, 3 lanes
20	The MIDLANDS Gloucester The SOUTH WEST Bristol & M5	M5		M5	The SOUTH WEST Bristol (W) The MIDLANDS Gloucester M5
	5 miles, 3 lanes				2 miles, 2 lanes
21		M48			Chepstow M48
	2 lanes				3 miles, 2 lanes
22	The SOUTH WEST Avonmouth M49 (M5 )			M49	Avonmouth M49
	7 miles, 3 lanes
	Severn				Severn
					6 miles, 3 lanes
					Severn Bridge Toll

23	Chepstow M48	M48
	1 mile, 3 lanes				2 miles, 3 lanes
23A	Magor B4245 Magor			B4245	Magor Caldicot B4245 Magor
	4 miles, 3 lanes				4 miles, 3 lanes
24	The MIDLANDS Monmouth A449 (M50 ) Newport A48	A48 A449		A48 B4237	Newport (E) A48 Monmouth A449
	4 miles, 3 lanes				3 miles, 3 lanes
25		B4596		B4596	Caerleon B4596
					0 miles, 3 lanes
25A		A4042		A4042	Newport Cwmbran A4042
	2 lanes
	Brynglas				Brynglas
					1 mile, 2 lanes
26	Cwmbran Newport Caerleon A4051	A4051		A4051	Newport A4051
	2 miles, 3 lanes				2 miles, 3 lanes
27	High Cross B4591	B4591		B4591	High Cross B4591
	1 mile, 3 lanes				1 mile, 3 lanes
28	Newport A48 Risca Brynmawr A467	A467		A48 A48	Newport A48 Risca Brynmawr A467
	5 miles, 3 lanes				2 miles, 3 lanes
29				A48(M)	Cardiff (E & S) A48(M)
					3 miles, 2 lanes
30	Cardiff (E) A4232 Cardiff Gate			A4232	Cardiff (E) A4232 Cardiff Gate
	5 miles, 2 lanes				5 miles, 2 lanes
32	Cardiff Merthyr Tydfil A470	A4054 A470		A470 A4054	Cardiff (N) Merthyr Tydfil A470
	3 miles, 3 lanes				3 miles, 3 lanes
33	Cardiff (W) & Barry Penarth A4232 Cardiff West			A4232	Cardiff (W) & Barry Penarth A4232 Cardiff West
	2 miles, 4 lanes				2 miles, 3 lanes
34	Llantrisant Rhondda A4119	A4119			Llantrisant Rhondda A4119
	6 miles, 3 lanes				6 miles, 3 lanes
35	Bridgend Pen-coed A473	A473		A473	Bridgend Pen-coed A473
	4 miles, 3 lanes				4 miles, 3 lanes
36	Bridgend A4061 Maesteg A4063 Sarn Park	A4061 A4063		A4061	Bridgend A4061 Maesteg A4063 Sarn Park
	6 miles, 3 lanes				6 miles, 3 lanes
37	Pyle Porthcawl A4229	A4229 (A48)		A4229	Porthcawl Pyle A4229
	3 miles, 3 lanes				3 miles, 3 lanes
38	Port Talbot A48	A48			Port Talbot A48
	4 miles, 2 lanes
39				A48
					4 miles, 2 lanes
40	Port Talbot A4107	A4107		A4107 (A48)	Port Talbot A4107
	1 mile, 2 lanes
41	Port Talbot A48	A48		B4286 A48
	4 miles, 3 lanes				2 miles, 2 lanes
41		(A48)			Briton Ferry A48
	2 lanes
	Neath				Neath
					3 miles, 2 lanes
42		A483		A483	Swansea A483

42	Briton Ferry A48 Swansea A483	(A48) (A483)
	2 miles, 3 lanes				2 miles, 3 lanes
43	Neath Merthyr Tydfil A465	A465		B4290	Neath Merthyr Tydfil A465
	2 miles, 2 lanes				2 miles, 2 lanes
44	Swansea (E) A48	A4230 B4291		A48	Swansea (E) A48
	2 miles, 2 lanes				2 miles, 2 lanes
45	Swansea Pontardawe A4067	A4067 B4603		A4067 B4603	Swansea Pontardawe A4067
	4 miles, 2 lanes				2 miles, 2 lanes
46	Llangyfelach B4489 Felindre			A48 B4489 A48	Llangyfelach B4489 Felindre
					2 miles, 2 lanes
47	Swansea (W) A483 Swansea (West)			A48 A483 A48	Swansea (W) A483 Swansea (West)
	4 miles, 2 lanes
	Loughor				Loughor
					4 miles, 2 lanes
48	Pontarddulais Llanelli A4138	A4138		A4138	Pontarddulais Llanelli A4138
	3 miles, 2 lanes				3 miles, 2 lanes
49	N/A	A48 A483	A48 WEST		Pont Abraham

					Carmarthen A48

					Llandeilo A483

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