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{{UK motorway routebox|| motorway= M4| length-mi= 189.5| length-km= 305.0| direction= East - West| start= London
Chiswick ([Hounslow)
London Heathrow AirportSloughMaidenhead
Reading, Berkshire
Newbury, Berkshire
Swindon
Chippenham, Wiltshire
BristolNewportCwmbran
Cardiff
Bridgend
Port TalbotNeathSwanseaLlanelli| opening-date= [1961| junctions= 4B -
[M25 motorway8/9 -
A308(M) motorway8/9 -
A404(M) motorway
10 -
A329(M) motorway19 -
M32 motorway20 -
M5 motorway
21 -
M48 motorway
22 -
M49 motorway
23 -
M48 motorway29 -
A48(M) motorway| euroroute= | misc=
Opening timelineImageSize = width:150 height:500Period = from:1 till:49Colors =id:M4 value:rgb(0,0.7,1)
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The
M4 motorway is a motorway in
Great Britain linking
London with
Wales. It is part of the unsigned
European route E30. Other major places directly accessible from M4 junctions are Reading, Berkshire,
Swindon, Bristol, Newport, Cardiff and Swansea.
The M4 runs close to the
A4 road from London to Bristol. After crossing the River Severn it follows the A48 road through
Wales, until its termination just north of Pontarddulais.
Special features
(England) between junctions 19 and 20, looking west towards
Wales.In London, the eastbound (London-bound) M4 carriageway has a bus lane from junction 3 until the elevated section. This lane caused some controversy when it was created.{{cite news]--> However, the bus lane has improved traffic flow onto the 2-lane elevated section which follows it. There is some speculation that the original plan involved closing one lane from junction 3 to the elevated section to prevent congestion caused by the filtering of three lanes of traffic into two (the motorway is already temporarily down to two lanes at junction 3 because the left lane is exclusively for traffic leaving the motorway, so the effect of the bus lane is to make the 3-to-2 lane-transition seamless). Making the "spare" lane available for buses - and now taxis and motorcycles - was an afterthought.{{cite web|title=M4 Bus Lane|publisher=CBRD|url=http://www.cbrd.co.uk/indepth/m4buslane-->
The elevated section in West London, built in the 1960s, is mostly directly above the
A4 road and extends over parts of Brentford's Golden Mile (Brentford). This section has a heated road surface to reduce icing in winter.
The motorway is the only one in the UK to feature a 'dual-numbered' junction. Junction '8/9' is the turn off for Maidenhead,
Berkshire.
There is a special slip road west of the
A34 road to Newbury, Berkshire from the eastbound carriageway which leads to RAF Welford. This slip road is signposted in red lettering (the normal military signing standard), "Works Unit Only".
It has two of only three four-level stack interchanges in the UK, including the first UK example at the junction with the M5 (J20/"Almondsbury Interchange") and the other at the junction with the M25 (J4B). Both are impressive feats of engineering, particularly junction 4B which also has to make provision for a railway line passing beneath the M4. However, due to the nature of such junctions, drivers should bear in mind that it is impossible to make a U-turn at J20 or J4B.
The M4 Second Severn Crossing the
River Severn via a toll bridge, the second of only two on the UK motorway network — the first was the original Severn Bridge (the original route of the M4, now the
M48 motorway).
The M4 passes through the
Brynglas Tunnels at Junction 25a,
Newport.
Near Junction 35, there is a stretch of the motorway that has a surfacing of porous asphalt concrete that improves drainage and reduces noise. When driving in heavy rain conditions drivers notice a reduction in spray from other vehicles and improved visibility. This special surface was publicised in an episode of the BBCs Tomorrow's World programme. This was the site of the first trial of the new road surface when it was laid down in 1993http://www.hanson.biz/files/pdf/magazine/2006/2006Q4_op.pdf.
Notable junctions
Junction 27 at High Cross is a normal roundabout B-road junction, however the slip roads point in the wrong direction to the destination. Due to the topology of the landscape, both sets of sliproads are conjoined on opposite sides of the roundabout. To go to Cardiff, the driver must use an eastbound-facing sliproad before looping around 180 degrees to join the westbound carriageway.
During the construction of the section around Cardiff in 1980, junction numbers were set aside for intermediate interchanges that were not built at the time. 33 had been set for the link road to the west (
A4232 road), 32 for the A470 road, with 31 intended for the A469 to Caerphilly, and 30 for the great "Hook Road" - a plan which was later shelved. Junction 30 was later added to serve the
A4232 road, in the east, which will eventually form a beltway from junctions 33 to 30, via Cardiff Bay. Number 31 remains unused as of 2006, and there are no immediate plans to build a junction with the A469.
Contrary to popular belief, junction 39
does exist. However, it consists of a single slip road completing the missing movement onto the westbound carriageway from the A48 road at junction 38, thus there is no exit from the motorway at this junction.
Junction 41 refers to two different junctions in two different directions, their movements not complementary. In the westbound direction, 41 is indicated as a spur leading to the roundabout in
Briton Ferry formerly known as 41A, and the original bridge over the
River Neath, which would allow access onto the stretch of the M4 from junction 43 westward. In the eastbound direction, 41 is indicated as an exit-only route to the A48 towards Port Talbot. As a result, it is possible in both directions to travel almost 2 miles (3 km) in the same direction having both joined and subsequently left the motorway at "junction 41".
Speed checks
from England to Wales on a
cable-stayed bridge (the
Second Severn Crossing). Wales is seen in the distance.Speed checks are carried out between junction 14 and junction 18 (in both directions). These are carried out by Mobile speed camera situated on bridges over the motorway. These measure the speed of vehicles using laser detection equipment. The introduction of these measures proved controversial and resulted in a public protest, involving a go-slow of several hundred vehicles along the affected sections of the motorway during April 2005.{{
cite news|url=http://news.bbc.co.uk/1/hi/england/wiltshire/4498551.stm|publisher=BBC News|title=Drivers hold M4 speed camera demo|date=April 30, 2005
-->
Traffic heading into London travels at a maximum speed of 60 mph (97 km/h) after the
London Heathrow Airport turnoff, the limit is enforced by Speed camera. The elevated section is also enforced by speed cameras at 40 mph (64 km/h). Traffic heading out of London is limited to 40 mph (64 km/h) on the elevated section, but there are no cameras.
Speed checks are also carried out by mobile Safety Camera Partnership vans on the toll plaza on the Welsh side of the M4 after the Second Severn Bridge. The speed limit is reduced to 50 mph (80 km/h) when approaching the toll plaza, and then raised back to the
National speed limit after leaving the toll plaza. There are also mobile camera vans on sections of the M4 between the toll plaza and Cardiff.
Between Junction 34 and Junction 37, there are three bridges crossing over the motorway. These three bridges sometimes have mobile speed camera vans parked on them to catch speeding motorists on the motorway below. These bridges are located on fairly sharp bends in the motorway.
The section between junction 40 and junction 41 has a maximum speed of 50 mph (80 km/h), and is enforced by a permanent speed camera (Gatso), to be found near junction 41 in the eastbound direction. To improve traffic flow, the westbound speed camera was removed in late 2006 and replaced with an electronic warning sign.{{cite news|url=http://www.injurywatch.co.uk/news-and-groups/news/road-traffic-accidents/controversial-m4-speed-camera-removed-to-reduce-chronic-congestion-15760700|publisher=injurywatch|title=Controversial M4 speed camera removed to reduce chronic congestion|accessdate=April 30, 2005|language=English-->
Developments
As of spring 2007, the stretch between Junction 29 Castleton and J32 Coryton is being widened to 6 lanes in order to relieve congestion that plagues this stretch. Work is expected to be completed by December 2009 www.m4widening29to32.com.
Plans are progressing for the
M4 Toll Newport bypass. The Welsh Assembly Government Transport Minister Ieuan Wyn Jones said "We could start the work in 2010, with an anticipated completion date of 2013." Plans for the M4 Toll (Newport)
A new junction is to be constructed near Reading, Berkshire commencing in Spring 2008.{{cite news|url=http://icberkshire.icnetwork.co.uk/chronicle/headlines/tm_headline=reading-is-the-fastest-growing-economic-centre-in-uk&method=full&objectid=19433560&siteid=50102-name_page.html|publisher=Reading Chronicle|title=Reading is the fastest-growing economic centre in UK|date=July 10, 2007-->
Route
{| border="1" cellpadding="2" class="wikitable" style="border-collapse: collapse; text-align:center; margin:0 auto"|-!colspan="3"| M4 Motorway|-!width=40%| Eastbound exits!width=20%| Junction!width=40%| Westbound exits|-!colspan=3| A4 from/to
Central London becomes M4]:
North Circular A205 road:
South Circular A315 road:
Chiswick: [North Circular A205 road:
South Circular A315 road:
Chiswick! 2], Hounslow, Brentford|-| [A312 road: London Heathrow Airport (Terminals 4, 5 & Cargo), Hayes, Hillingdon,
Harrow, London, Hounslow! 3]: London Heathrow Airport (Terminals 4, 5 & Cargo), Hayes, Hillingdon,
Harrow, London, Hounslow): [Uxbridge! 4]): Uxbridge: Heathrow (Terminals 4, 5 & Cargo), [Gatwick Airport,
Watford, Oxford,
Winchester (M1 motorway, M23 motorway, M3 motorway)! 4B|
M25 motorway: Heathrow (Terminals 4, 5 & Cargo), Gatwick Airport, Watford, Oxford,
Winchester (M1 motorway, M23 motorway, M3 motorway)|-| A4: Colnbrook, Langley, Slough
List of B roads in Great Britain:
Eton, Berkshire,
Datchet! 5],
Langley, SloughList of B roads in Great Britain: Eton, Berkshire,
Datchet: [Slough (Central)
A322 road:
Windsor, Berkshire! 6|
A355 road:
Slough (Central)
A322 road:
Windsor, Berkshire|-| A4: Slough (West)! 7| A4: Slough (West)|-|
A404(M) motorway: High Wycombe, Henley-on-Thames
A308(M) motorway:
Maidenhead! 8/9]:
High Wycombe, Henley-on-Thames
A308(M) motorway: Maidenhead: [Reading, Berkshire (East),
Wokingham, Bracknell! 10]:
Reading, Berkshire (East), Wokingham, Bracknell: [Basingstoke, Reading (Central)! 11]: Basingstoke, Reading (Central)]|-| A4: Reading (West),
Theale, Berkshire! 12| A4: Reading (West), Theale, Berkshire|-| A34 road:
Newbury, Berkshire, Oxford! 13
Chieveley services| A34 road:
Newbury, Berkshire,
Oxford: [Hungerford,
Wantage! 14]: Hungerford,
Wantage|-| [A419 road:
Swindon (East)
A346 road: Marlborough (A420 road): Oxford! 15| A419 road:
Swindon (East), Gloucester A346 road:
Marlborough: [Swindon (West),
Wootton Bassett, RAF Lyneham, Calne! 16]:
Swindon (West), Wootton Bassett, RAF Lyneham,
Calne: [Chippenham, Wiltshire A429 road: Cirencester! 17]: Chippenham, Wiltshire
A429 road: Cirencester|-| [A46 road: Bath, Somerset,
Stroud, Gloucestershire! 18|
A46 road: Bath, Somerset,
Stroud, Gloucestershire|-|
M32 motorway: Bristol! 19]:
Bristol S: The SOUTH WEST, Bristol (West) [M5 motorway N: Midlands, Gloucester! 20 Almondsbury Interchange S: The SOUTH WEST, Bristol (West), Exeter
[M5 motorway N:
Midlands, Gloucester: [Chepstow
Exit only]:
Avonmouth (M5 S): The SOUTH WEST,
Bridgwater, Exeter! 22]: Avonmouth|-!colspan=3| [Second Severn Crossing|-|
No tolls!
Tolls|
Toll Booth|-|
M48: Chepstow
Exit only! 23|
Access only|-| [List of B roads in Great Britain: Magor, Monmouthshire, Caldicot, Monmouthshire! 23A
Magor services|
List of B roads in Great Britain:
Magor, Monmouthshire,
Caldicot, Monmouthshire|-|
A48 road:
Newport city centre List of B roads in Great Britain:
Newport A449 road:
Monmouth (M50 motorway (England)): The MIDLANDS! 24| A48 road: Newport city centre List of B roads in Great Britain: Newport A449 road: Monmouth: [Caerleon
Exit only]: Newport,
CwmbranExit only]|-| A4051 road: Newport, Cwmbran, Caerleon! 26| A4051 road: Newport|-|
List of B roads in Great Britain:
High Cross, Newport! 27|
List of B roads in Great Britain: High Cross, Newport|-| A48: Newport
A467 road: Risca, Brynmawr! 28]: Risca,
Brynmawr: [Cardiff East and South
Exit only]: Cardiff East! 30
Cardiff Gate Services|
A4232 road: Cardiff East|-| A470 road: Cardiff North,
Merthyr Tydfil! 32]: Cardiff North, Merthyr Tydfil, [Barry, Wales, Penarth! 33
Cardiff West services| A4232: Cardiff West, Cardiff International Airport,
Barry, Wales, Penarth: [Llantrisant,
Rhondda! 34]:
Llantrisant, Rhondda: [Pencoed! 35| A473 road: Pencoed, Bridgend: Bridgend A4063: [Maesteg! 36
Sarn Park services|
A4061 road: Bridgend A4063: Maesteg: [Porthcawl, Pyle! 37]: Porthcawl,
Pyle! 38| A48: [Port TalbotExit only]: Port Talbot! 40| A4107 road: Port Talbot|-| A48: Port Talbot
Exit only!rowspan="2"| 41|
Access only|-|
Access only| A48: Briton Ferry
Exit only]:
Swansea A48: Briton Ferry! 42]:
Swansea: [Neath,
Merthyr Tydfil! 43]: Neath, Merthyr Tydfil: Swansea, [Pontardawe! 45]: Swansea, Pontardawe: Swansea, [Llangyfelach! 46]: Swansea, Llangyfelach| A483: Swansea A48: [Pontarddulais: Pontarddulais, [Llanelli! 48]: Pontarddulais, Llanelli|
End of motorwayA48: [Carmarthen A483:
Ammanford|}
See also
References
External links
- CBRD Motorway Database - M4
- British Road Database: Motorways - M4 Junction 8/9
- The Motorway Archive
- Junctions 1 to 5
- Junctions 5 to 7
- Junctions 8 to 14
- Junctions 14 to 21
- Junctions 21 to 23
- Junctions 23 to 49
{{UK motorway routebox|| motorway= M4| length-mi= 189.5| length-km= 305.0| direction= East - West| start=
LondonChiswick ([Hounslow)
London Heathrow AirportSloughMaidenhead
Reading, BerkshireNewbury, BerkshireSwindonChippenham, Wiltshire
BristolNewportCwmbran
Cardiff
Bridgend
Port Talbot
Neath
Swansea
Llanelli| opening-date= [1961| junctions= 4B -
[M25 motorway
8/9 -
A308(M) motorway
8/9 -
A404(M) motorway
10 -
A329(M) motorway19 -
M32 motorway
20 -
M5 motorway
21 -
M48 motorway
22 -
M49 motorway23 -
M48 motorway
29 -
A48(M) motorway| euroroute= | misc=
Opening timelineImageSize = width:150 height:500Period = from:1 till:49Colors =id:M4 value:rgb(0,0.7,1)
id:background value:rgb(0.97265625,0.97265625,0.97265625)
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color:M4
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The
M4 motorway is a motorway in Great Britain linking London with
Wales. It is part of the unsigned
European route E30. Other major places directly accessible from M4 junctions are Reading, Berkshire,
Swindon, Bristol, Newport, Cardiff and Swansea.
The M4 runs close to the A4 road from London to Bristol. After crossing the River Severn it follows the A48 road through Wales, until its termination just north of Pontarddulais.
Special features
(England) between junctions 19 and 20, looking west towards Wales.In London, the eastbound (London-bound) M4 carriageway has a
bus lane from junction 3 until the elevated section. This lane caused some controversy when it was created.{{cite news]--> However, the bus lane has improved traffic flow onto the 2-lane elevated section which follows it. There is some speculation that the original plan involved closing one lane from junction 3 to the elevated section to prevent congestion caused by the filtering of three lanes of traffic into two (the motorway is already temporarily down to two lanes at junction 3 because the left lane is exclusively for traffic leaving the motorway, so the effect of the bus lane is to make the 3-to-2 lane-transition seamless). Making the "spare" lane available for buses - and now taxis and motorcycles - was an afterthought.{{cite web|title=M4 Bus Lane|publisher=CBRD|url=http://www.cbrd.co.uk/indepth/m4buslane-->
The elevated section in West London, built in the 1960s, is mostly directly above the
A4 road and extends over parts of
Brentford's Golden Mile (Brentford). This section has a heated road surface to reduce icing in winter.
The motorway is the only one in the UK to feature a 'dual-numbered' junction. Junction '8/9' is the turn off for Maidenhead,
Berkshire.
There is a special slip road west of the A34 road to
Newbury, Berkshire from the eastbound carriageway which leads to
RAF Welford. This slip road is signposted in red lettering (the normal military signing standard), "Works Unit Only".
It has two of only three four-level
stack interchanges in the UK, including the first UK example at the junction with the M5 (J20/"Almondsbury Interchange") and the other at the junction with the M25 (J4B). Both are impressive feats of engineering, particularly junction 4B which also has to make provision for a railway line passing beneath the M4. However, due to the nature of such junctions, drivers should bear in mind that it is impossible to make a U-turn at J20 or J4B.
The M4
Second Severn Crossing the
River Severn via a
toll bridge, the second of only two on the UK motorway network — the first was the original Severn Bridge (the original route of the M4, now the
M48 motorway).
The M4 passes through the
Brynglas Tunnels at Junction 25a,
Newport.
Near Junction 35, there is a stretch of the motorway that has a surfacing of porous
asphalt concrete that improves drainage and reduces noise. When driving in heavy rain conditions drivers notice a reduction in spray from other vehicles and improved visibility. This special surface was publicised in an episode of the BBCs Tomorrow's World programme. This was the site of the first trial of the new road surface when it was laid down in 1993http://www.hanson.biz/files/pdf/magazine/2006/2006Q4_op.pdf.
Notable junctions
Junction 27 at High Cross is a normal roundabout B-road junction, however the slip roads point in the wrong direction to the destination. Due to the topology of the landscape, both sets of sliproads are conjoined on opposite sides of the roundabout. To go to Cardiff, the driver must use an eastbound-facing sliproad before looping around 180 degrees to join the westbound carriageway.
During the construction of the section around Cardiff in 1980, junction numbers were set aside for intermediate interchanges that were not built at the time. 33 had been set for the link road to the west (A4232 road), 32 for the
A470 road, with 31 intended for the A469 to Caerphilly, and 30 for the great "Hook Road" - a plan which was later shelved. Junction 30 was later added to serve the
A4232 road, in the east, which will eventually form a
beltway from junctions 33 to 30, via
Cardiff Bay. Number 31 remains unused as of 2006, and there are no immediate plans to build a junction with the A469.
Contrary to popular belief, junction 39
does exist. However, it consists of a single slip road completing the missing movement onto the westbound carriageway from the
A48 road at junction 38, thus there is no exit from the motorway at this junction.
Junction 41 refers to two different junctions in two different directions, their movements not complementary. In the westbound direction, 41 is indicated as a spur leading to the roundabout in
Briton Ferry formerly known as 41A, and the original bridge over the River Neath, which would allow access onto the stretch of the M4 from junction 43 westward. In the eastbound direction, 41 is indicated as an exit-only route to the A48 towards Port Talbot. As a result, it is possible in both directions to travel almost 2 miles (3 km) in the same direction having both joined and subsequently left the motorway at "junction 41".
Speed checks
from England to
Wales on a cable-stayed bridge (the
Second Severn Crossing). Wales is seen in the distance.Speed checks are carried out between junction 14 and junction 18 (in both directions). These are carried out by
Mobile speed camera situated on bridges over the motorway. These measure the speed of vehicles using laser detection equipment. The introduction of these measures proved controversial and resulted in a public protest, involving a go-slow of several hundred vehicles along the affected sections of the motorway during April 2005.{{
cite news|url=http://news.bbc.co.uk/1/hi/england/wiltshire/4498551.stm|publisher=BBC News|title=Drivers hold M4 speed camera demo|date=April 30, 2005
-->
Traffic heading into London travels at a maximum speed of 60 mph (97 km/h) after the London Heathrow Airport turnoff, the limit is enforced by Speed camera. The elevated section is also enforced by speed cameras at 40 mph (64 km/h). Traffic heading out of London is limited to 40 mph (64 km/h) on the elevated section, but there are no cameras.
Speed checks are also carried out by mobile
Safety Camera Partnership vans on the toll plaza on the Welsh side of the M4 after the Second Severn Bridge. The speed limit is reduced to 50 mph (80 km/h) when approaching the toll plaza, and then raised back to the
National speed limit after leaving the toll plaza. There are also mobile camera vans on sections of the M4 between the toll plaza and Cardiff.
Between Junction 34 and Junction 37, there are three bridges crossing over the motorway. These three bridges sometimes have mobile speed camera vans parked on them to catch speeding motorists on the motorway below. These bridges are located on fairly sharp bends in the motorway.
The section between junction 40 and junction 41 has a maximum speed of 50 mph (80 km/h), and is enforced by a permanent speed camera (
Gatso), to be found near junction 41 in the eastbound direction. To improve traffic flow, the westbound speed camera was removed in late 2006 and replaced with an electronic warning sign.{{cite news|url=http://www.injurywatch.co.uk/news-and-groups/news/road-traffic-accidents/controversial-m4-speed-camera-removed-to-reduce-chronic-congestion-15760700|publisher=injurywatch|title=Controversial M4 speed camera removed to reduce chronic congestion|accessdate=April 30, 2005|language=English-->
Developments
As of spring 2007, the stretch between Junction 29 Castleton and J32 Coryton is being widened to 6 lanes in order to relieve congestion that plagues this stretch. Work is expected to be completed by December 2009 www.m4widening29to32.com.
Plans are progressing for the
M4 Toll Newport bypass. The Welsh Assembly Government Transport Minister Ieuan Wyn Jones said "We could start the work in 2010, with an anticipated completion date of 2013." Plans for the M4 Toll (Newport)
A new junction is to be constructed near Reading, Berkshire commencing in Spring 2008.{{cite news|url=http://icberkshire.icnetwork.co.uk/chronicle/headlines/tm_headline=reading-is-the-fastest-growing-economic-centre-in-uk&method=full&objectid=19433560&siteid=50102-name_page.html|publisher=Reading Chronicle|title=Reading is the fastest-growing economic centre in UK|date=July 10, 2007-->
Route
{| border="1" cellpadding="2" class="wikitable" style="border-collapse: collapse; text-align:center; margin:0 auto"|-!colspan="3"| M4 Motorway|-!width=40%| Eastbound exits!width=20%| Junction!width=40%| Westbound exits|-!colspan=3| A4 from/to Central London becomes M4]: North Circular
A205 road:
South Circular A315 road:
Chiswick: [North Circular A205 road:
South Circular A315 road: Chiswick! 2], Hounslow, Brentford|-| [A312 road: London Heathrow Airport (Terminals 4, 5 & Cargo), Hayes, Hillingdon,
Harrow, London, Hounslow! 3]: London Heathrow Airport (Terminals 4, 5 & Cargo),
Hayes, Hillingdon,
Harrow, London, Hounslow): [Uxbridge! 4]):
Uxbridge: Heathrow (Terminals 4, 5 & Cargo), [Gatwick Airport,
Watford, Oxford, Winchester
(M1 motorway, M23 motorway, M3 motorway)! 4B|
M25 motorway: Heathrow (Terminals 4, 5 & Cargo), Gatwick Airport,
Watford,
Oxford, Winchester
(M1 motorway, M23 motorway, M3 motorway)|-| A4:
Colnbrook, Langley, Slough
List of B roads in Great Britain:
Eton, Berkshire,
Datchet! 5],
Langley, SloughList of B roads in Great Britain:
Eton, Berkshire, Datchet: [Slough (Central) A322 road: Windsor, Berkshire! 6|
A355 road: Slough (Central) A322 road: Windsor, Berkshire|-| A4: Slough (West)! 7| A4: Slough (West)|-|
A404(M) motorway:
High Wycombe,
Henley-on-Thames A308(M) motorway: Maidenhead! 8/9]:
High Wycombe,
Henley-on-Thames A308(M) motorway:
Maidenhead: [Reading, Berkshire (East),
Wokingham,
Bracknell! 10]: Reading, Berkshire (East), Wokingham, Bracknell: [Basingstoke, Reading (Central)! 11]: Basingstoke, Reading (Central)]|-| A4: Reading (West), Theale, Berkshire! 12| A4: Reading (West),
Theale, Berkshire|-| A34 road:
Newbury, Berkshire, Oxford! 13
Chieveley services|
A34 road: Newbury, Berkshire,
Oxford: [Hungerford, Wantage! 14]: Hungerford, Wantage|-| [A419 road:
Swindon (East) A346 road:
Marlborough (
A420 road): Oxford! 15|
A419 road: Swindon (East), Gloucester
A346 road: Marlborough: [Swindon (West), Wootton Bassett, RAF Lyneham,
Calne! 16]: Swindon (West),
Wootton Bassett,
RAF Lyneham, Calne: [Chippenham, Wiltshire A429 road:
Cirencester! 17]:
Chippenham, Wiltshire A429 road:
Cirencester|-| [A46 road: Bath, Somerset,
Stroud, Gloucestershire! 18|
A46 road:
Bath, Somerset,
Stroud, Gloucestershire|-|
M32 motorway: Bristol! 19]:
Bristol S: The SOUTH WEST, Bristol (West) [M5 motorway N: Midlands, Gloucester! 20 Almondsbury Interchange S: The SOUTH WEST, Bristol (West), Exeter
[M5 motorway N: Midlands,
Gloucester: [Chepstow Exit only]:
Avonmouth (M5 S): The SOUTH WEST,
Bridgwater, Exeter! 22]: Avonmouth|-!colspan=3| [Second Severn Crossing|-|
No tolls!
Tolls|
Toll Booth|-|
M48: Chepstow
Exit only! 23|
Access only|-| [List of B roads in Great Britain: Magor, Monmouthshire,
Caldicot, Monmouthshire! 23A
Magor services|
List of B roads in Great Britain: Magor, Monmouthshire,
Caldicot, Monmouthshire|-|
A48 road: Newport city centre List of B roads in Great Britain: Newport
A449 road:
Monmouth (M50 motorway (England)): The MIDLANDS! 24|
A48 road: Newport city centre
List of B roads in Great Britain: Newport A449 road:
Monmouth: [CaerleonExit only]: Newport,
CwmbranExit only]|-| A4051 road: Newport, Cwmbran, Caerleon! 26| A4051 road: Newport|-|
List of B roads in Great Britain:
High Cross, Newport! 27|
List of B roads in Great Britain:
High Cross, Newport|-| A48: Newport A467 road:
Risca,
Brynmawr! 28]:
Risca,
Brynmawr: [Cardiff East and South
Exit only]: Cardiff East! 30
Cardiff Gate Services| A4232 road: Cardiff East|-| A470 road: Cardiff North, Merthyr Tydfil! 32]: Cardiff North, Merthyr Tydfil, [Barry, Wales,
Penarth! 33
Cardiff West services| A4232: Cardiff West,
Cardiff International Airport,
Barry, Wales, Penarth: [Llantrisant, Rhondda! 34]: Llantrisant, Rhondda: [Pencoed! 35|
A473 road:
Pencoed,
Bridgend: Bridgend A4063: [Maesteg! 36
Sarn Park services| A4061 road: Bridgend A4063:
Maesteg: [Porthcawl, Pyle! 37]:
Porthcawl, Pyle! 38| A48: [Port Talbot
Exit only]: Port Talbot! 40| A4107 road: Port Talbot|-| A48: Port Talbot
Exit only!rowspan="2"| 41|
Access only|-|
Access only| A48:
Briton FerryExit only]: Swansea A48: Briton Ferry! 42]: Swansea: [Neath,
Merthyr Tydfil! 43]: Neath,
Merthyr Tydfil: Swansea, [Pontardawe! 45]: Swansea, Pontardawe: Swansea, [Llangyfelach! 46]: Swansea, Llangyfelach| A483: Swansea A48: [Pontarddulais: Pontarddulais, [Llanelli! 48]: Pontarddulais,
Llanelli| End of motorway
A48: [Carmarthen A483:
Ammanford|}
See also
References
External links
- CBRD Motorway Database - M4
- British Road Database: Motorways - M4 Junction 8/9
- The Motorway Archive
- Junctions 1 to 5
- Junctions 5 to 7
- Junctions 8 to 14
- Junctions 14 to 21
- Junctions 21 to 23
- Junctions 23 to 49
CBRD - Motorway Database - M4
Motorway Database. You are here: Home - Motorway Database - M4. Main - Images - Timeline - Exit List. Easily one of the most varied motorways in Britain, from urban chaos in west ...
M4 Motorway
Located in the central western suburbs of Sydney, owned by Statewide Roads.
M4 motorway - Wikipedia, the free encyclopedia
The M4 motorway is a motorway in Great Britain linking London with Wales. It is part of the unsigned European route E30. Other major places directly accessible from M4 junctions ...
Detailed Record
Mr Robert England . IoE Number: 469289 Location: SEVERN BRIDGE AND AUST VIADUCT FIRST SEVERN CROSSING, M4 MOTORWAY AUST, FOREST OF DEAN, GLOUCESTERSHIRE
Motorway Services | Swansea | M4 J47 | Moto Service Area Information
Motorway services. Moto is the UKs largest provider of motorway service areas. Our aim is to provide you with a relaxing and refreshing break from your journey, with a wide choice ...
Motorway Services | Cardiff West | M4 J33 | Moto Service Area ...
Motorway services. Moto is the UKs largest provider of motorway service areas. Our aim is to provide you with a relaxing and refreshing break from your journey, with a wide choice ...
By Car The M4 motorway joins Bat
By Car The M4 motorway joins Bath to London in the east and Wales in the west. The M5 links the city with the Midlands to the north, with Somerset, Devon and Cornwall to the ...
BBC NEWS | UK | Wales | Five die in crash on M4 motorway
Police confirm five people died, and a sixth is in hospital, after a collision which closed part of the M4 motorway.
The M4 Motorway (Hillingdon and Hounslow) (Speed Limits) Regulations ...
Statutory Instrument 2002 No. 1651. The M4 Motorway (Hillingdon and Hounslow) (Speed Limits) Regulations 2002
The M4 Motorway Slip Road (Junction 44, Lon-Las) Scheme 2003
Welsh Statutory Instrument 2003 No. 406 (W.57) The M4 Motorway Slip Road (Junction 44, Lon-Las) Scheme 2003
