A roads in Zone 4 of the Great Britain numbering scheme

The numbering zones for A-roads in Great Britain

List of A roads in zone 4 in Great Britain starting north of the A4 and south/west of the A5 (roads beginning with 4).

Single- and double-digit roads

Road	From	To	Notes
A4 road	City of London (Holborn Circus)	Avonmouth	Originally London to Bath
A40 road	City of London (near St. Paul's Cathedral)	Fishguard	The longest A road in Zone 4 at 256 miles long
A41 road	Central London (near Marble Arch)	Birkenhead	A large section of the former A41, from Bicester to Solihull, was downgraded when the northern extension of the M40 motorway was opened, as was a section in Birmingham due to other road improvements; most of it is now the non-contiguous B4100.
A42 road	Kegworth	Appleby Magna	A continuation of the M42, hence the use of A42 despite being entirely in Zone 5. Early road atlases show the A42 running along the present A4074 and A34 from Reading to Birmingham.
A43 road	M40 motorway Junction 10 north of Bicester	Stamford
A44 road	Oxford	Aberystwyth	Officially the most dangerous road in Wales between Aberystwyth and Llangurig.
A45 road	Birmingham	Thrapston	Previously continued along route of current A14 to Felixstowe
A46 road	Bath	Cleethorpes	Most of the section betweens Evesham and Leicester replaced by new-build sections, as well as the M69 motorway between Coventry and Leicester. The section from Cheltenham to Heath End (North of Stratford on Avon) was mostly reclassified as B4632 and much of what was previously the A435 from Cheltenham to Bidford was renamed the A46. A piece of A438 from M5 J9 to Toddington also became part of the A46, and the current section of the A46 round Stratford was new build.
A47 road	Leicester	Great Yarmouth	The section between Birmingham and Nuneaton has been now de-classified to B-roads, while the section between Nuneaton and Leicester via Hinckley is has been largely de-trunked since the M69 runs a similar route.
A48 road	Highnam near Gloucester	Carmarthen	Originally began in Worcester. Worcester to Newport is now A449.
A49 road	Ross-on-Wye	Bamber Bridge

Triple-digit roads

Road	From	To	Notes
A400 road	Central London (Trafalgar Square)	Archway	Takes the route of the Northern line, Charing Cross Branch and Barnet Branch
A401 road	Central London (Piccadilly Circus)	Angel	Along Shaftesbury Avenue, Bloomsbury Way, Theobald's Road, Rosebery Avenue and the northernmost part of St John Street
A402 road	Central London (Marble Arch)	Stamford Brook, Chiswick	Includes sections of the original A40 along Bayswater Road, Notting Hill Gate and Holland Park Avenue, the E/W carriageways of Shepherds Bush Green and Goldhawk Road
A403 road	M48 motorway, J1 near Aust	Avonmouth
A404 road	Central London (Edgware Road station)	Maidenhead	The London section is called Harrow Road for most of its length.
A405 road	Leavesden Green	Near Park Street
A406 road	Gunnersbury	Beckton	The North Circular Road
A407 road	Harlesden	Child's Hill	Through Willesden including the High Road and Cricklewood
A408 road	Harmondsworth	Uxbridge	The southern section in Sipson due to be demolished to make way for Heathrow Airport 3rd runway
A409 road	Northwick Park Hospital	Bushey	through the middle of Wealdstone and the western part of Stanmore known as Stanmore Common
A410 road	Pinner	Edgware	Uxbridge Road, through Stanmore Broadway, then London Road and Spur Road meeting the A41
A411 road	Watford	Barnet	Meets the A41 twice between which it goes through the centre of Watford, Bushey Arches and Bushey Heath, then through the northern part of Elstree, across Stirling Corner through Arkley and into Barnet
A412 road	Slough	Garston
A413 road	Gerrards Cross	Towcester
A414 road	Near Hemel Hempstead	Maldon
A415 road	Berinsfield	Witney
A416 road	Amersham	Berkhamsted
A417 road	Streatley	Leominster
A418 road	M40 motorway J8a	Ascott, Buckinghamshire
A419 road	Whitminster	Swindon
A420 road	Bristol	Oxford
A421 road	Croughton	Wyboston
A422 road	Bedford	Worcester	Concurrent with the A46 between Stratford-upon-Avon and Alcester
A423 road	Hinksey Hill	Coventry	Formerly ran from Maidenhead to Coventry via Oxford and Banbury, and a small section of this remains as part of the Oxford Ring Road. Now begins its former route at Banbury.
A424 road	Burford	A44 near Bourton-on-the-Hill
A425 road	Daventry	Warwick
A426 road	Leicester	Southam
A427 road	Market Harborough	Oundle
A428 road	Coventry	Cambridge	This road is now split in two parts between Great Barford and Eaton Socon due to the extension of the A421 to the A1.
A429 road	Chippenham	Coventry
A430 road	Quedgeley	Longford, Gloucester
A431 road	Bristol	Bath
A432 road	Bristol	Old Sodbury
A433 road	A46 at Dunkirk	A429 SW of Cirencester
A435 road	Birmingham	Cirencester	Concurrent with the A46 between Alcester and Teddington Hands
A436 road	A417 near Brockworth	A44 near Salford, Oxfordshire
A437 road	Harlington, London	A40 Western Avenue near Ickenham	Originally Gloucester to Newport, now A48.
A438 road	M5 motorway Junction 9	Llanfilo
A439 road	Stratford-upon-Avon	A46 4 miles SW of Warwick
A441 road	Birmingham	Cookhill
A442 road	Droitwich	Whitchurch
A443 road	Worcester	Newnham Bridge
A444 road	Coventry	Burton upon Trent
A445 road	Warwick	A45 at Ryton-on-Dunsmore
A446 road	Little Packington	Roughley
A447 road	Hinckley	Coalville	The original route through Hinckley was by-passed by a new road completed in the early 1990s
A448 road	Kidderminster	Studley, Warwickshire	The original route between Bromsgrove and Redditch was by-passed by a dual carriageway in the 1970s after Redditch was developed into a new town
A449 road	Newport	Stafford
A450 road	Torton	West Hagley
A451 road	Stourbridge	Great Witley
A452 road	Leamington Spa	Brownhills
A453 road	Nottingham	Birmingham
A454 road	Bridgnorth	Four Oaks	The section through Willenhall was renumbered in the 1970s following the completion of The Keyway by-passing the south of the town, and further reumbering took place in 1995 on the completion of the Black Country Route
A456 road	Birmingham	Woofferton	The section through Halesowen was renumbered when the by-pass opened in the 1960s
A457 road	Birmingham	Sedgley	The original route through Smethwick town centre was renumbered when a by-pass opened in about 1970
A458 road	Mallwyd	Quinton	Originally started in Dolgellau. Further renumberings have taken place over the years, notably when the town of Bridgnorth was by-passed in 1985
A459 road	Halesowen	Wolverhampton	Renumbering took place when Dudley town centre was by-passed by a new route of the A461 in 1999. The road continued south of Halesowen towards Bromsgrove until the 1970s.
A460 road	Wolverhampton	Rugeley	The section through the centre of Cannock was renumbered in 1989 when the town's by-pass opened.
A461 road	Lichfield	Stourbridge	Concurrent with the A41 between Wednesbury & Great Bridge
A462 road	Wednesbury	Laney Green	The section through Darlaston town centre became unclassified when a new by-pass opened in the late 1960s
A463 road	Wombourne	Willenhall	The section beyond Coseley was either renumbered or became unclassified when the Black Country Route was completed between 1986 and 1995
A464 road	Oaken	Hollinswood
A465 road	Bromyard	M4 motorway, Llandarcy
A466 road	King's Thorn	Chepstow
A467 road	Duffryn, Newport	A465, Brynmawr
A468 road	Bassaleg, Newport	A470, Nantgarw
A469 road	A4161, Roath, Cardiff	A465, Rhymney
A470 road	Cardiff	Llandudno	Originally Cardiff to Brecon.
A472 road	Treharris	Usk
A473 road	Pontypridd	Bridgend	Originally started at Treforest but following the completion of the Church Village bypass it now starts at Upper Boat and the section between Treforest and Gwaun Meisgyn is now downgraded to the B4595.
A474 road	Briton Ferry	Ammanford
A475 road	Newcastle Emlyn	Lampeter
A476 road	Llanelli	Llandeilo
A477 road	St Clears	Johnston
A478 road	Cardigan	Tenby
A479 road	Glanusk	Llyswen	Runs through the heart of the Brecon Beacons in Wales. Some maps incorrectly indicate another A479 running through Empire Way, Wembley (North West of London) but this actually is the B4565
A480 road	A44 at Lyonshall	A438 west of Hereford
A482 road	Aberaeron	Llanwrda
A483 road	Swansea	Chester	by way of Wrexham. Becomes A5 road in the vicinity of Oswestry.
A484 road	Cardigan	Cadle near Swansea	by way of Newcastle Emlyn, Carmarthen and Llanelli
A485 road	Tanerdy	Llanfarian
A486 road	New Quay	A484 near Saron
A487 road	Haverfordwest	Bangor
A488 road	Penybont	Shrewsbury
A489 road	Craven Arms	Machynlleth
A490 road	Churchstoke	Llanfyllin
A491 road	Lydiate Ash	Wall Heath
A493 road	Machynlleth	Dolgellau	Via Tywyn
A494 road	Queensferry	Dolgellau	Extension to M56 motorway opened late 2008.
A495 road	Whitchurch	A458 near Llanfair Caereinion	By-passes Oswestry as part of the A479 road which in turn becomes part of the A5 road.
A496 road	Llanelltyd	Blaenau Ffestiniog	Via Barmouth
A497 road	Porthmadog	Nefyn
A498 road	Pen-y-Gwryd	Porthmadog
A499 road	A487	Abersoch

Four-digit roads (40xx)

Road	From	To	Notes
A4000 road	Acton Town	Harlesden
A4001 road	Hanwell	Hanwell
A4002 road	Harlesden	Harlesden	Tubbs Road / Nightingale Road one-way system
A4003 road	Brondesbury	Willesden	Willesden Lane
A4004 road	Harlesden	Harlesden
A4005 road	West London (Hanger Lane Gyratory)	Roxeth
A4006 road	Harrow	West Hendon	Also known as Kenton Road and Kingsbury Road
A4007 road	Iver Heath	Uxbridge
A4008 road	Hatch End	Watford
A4010 road	High Wycombe	Aylesbury
A4012 road	Husborne Crawley	A4146
A4013 road	Kingsditch	Benhall
A4014 road	Pershore	A449 near Little Malvern
A4015 road	Cheltenham	Cheltenham
A4017 road	Kingswood	A4174 at Bromley Heath	Soundwell Road
A4018 road	Bristol	Cribbs Causeway
A4019 road	Coombe Hill	Cheltenham
A4020 road	Shepherds Bush	Denham	Known as the Uxbridge Road for most of its length (with short stretches known by other names).
A4023 road	Redditch	Matchborough	Used to run from Redditch to Coventry but nearly all the section has been downgraded to the B4101 upon completion of the M42 in 1986.
A4025 road	Stourport-on-Severn	A449
A4026 road	Sutton Coldfield	Little Aston
A4029 road	Edgbaston	Edgbaston	Pebble Mill Road, dual carriageway, formerly home to the BBC Pebble Mill Studios.
A4030 road	Bearwood	Smethwick
A4031 road	Smethwick	Walsall
A4032 road	Bristol	Bristol	Continuation of M32 motorway to A4044 inner ring road
A4033 road	Dudley	Oldbury
A4034 road	Quinton	West Bromwich
A4036 road	Dudley	Pedmore
A4037 road	Wednesbury	Dudley
A4038 road	Walsall	Moxley
A4039 road	Bilston	Penn, West Midlands
A4040 road			Birmingham Outer ring road
A4041 road	West Bromwich	Streetly
A4042 road	Abergavenny	A48, Newport
A4043 road	Blaenavon B4246	Pontypool, A472
A4044 road	Redcliffe, Bristol	St James Barton, Bristol	Inner ring road: Redcliffe Way, Temple Way, Bond Street
A4046 road	A465, Rassau	A467, Aberbeeg
A4047 road	A4048, Tredegar	A465, Brynmawr
A4048 road	A467, Crosskeys	A465, Tredegar
A4049 road	A4048, Pontllanfraith	A469, New Tredegar
A4050 road	A4232, Culverhouse Cross, Cardiff	A4055, Barry
A4051 road	Newport	North Cwmbran
A4053 road			Coventry Ring Road
A4054 road	A4119, Llandaff, Cardiff	A470, Cefn-Coed-y-Cymmer
A4055 road	A4232, Cardiff Bay, Cardiff	Barry Island, Barry
A4058 road	A470, Pontypridd	A4061, Treorchy	Originally started at Glyntaff but the sections between Glyntaff, Treforest and Pontypridd was downgraded to the B4595 following the completion of the Church Village bypass. This road originally ran through the village of Trealaw but following the completion of the Porth Relief road the section between Porth and Llwynypia was downgraded to the B4278 and the road now runs through the village of Dinas where the B4278 originally ran and also the former part of the A4119 near Llwynypia.
A4059 road	A470, Abercynon	A470, Between Brecon and Cefn-Coed-y-Cymmer
A4060 road	A470, Pentrebach	A465, Dowlais Top
A4061 road	Bridgend	Hirwaun
A4063 road	Bridgend	Cymmer
A4064 road	Sarn	Blaengarw
A4065 road	Tondu	Brynmenyn
A4066 road	St Clears	Pendine	Via Llanmiloe and Laugharne
A4067 road	West Cross, Swansea	Sennybridge
A4068 road	Gurnos	Brynamman
A4069 road	Llandovery	Gwaun-Cae-Gurwen
A4071 road	Dunsmore Heath	Rugby
A4074 road	Iffley	Caversham	Links Reading with Oxford
A4075 road	Canaston Bridge	Pembroke
A4076 road	Haverfordwest	Milford Haven
A4077 road	Crickhowell	Gilwern & Govilon
A4078 road	Talgarth	Three Cocks
A4079 road	Three Cocks	Llyswen
A4080 road	Menai Bridge	A55
A4081 road	Llandrindod Wells	Newbridge-on-Wye
A4082 road	Whitley, Coventry	Binley, Coventry	Allard Way
A4085 road	Minffordd	Caernarfon
A4086 road	Capel Curig	Caernarfon
A4087 road	Bangor	Bangor
A4088 road	Willesden	Sudbury, London
A4089 road	Alperton	Wembley Park
A4090 road	Wembley	North Harrow
A4091 road	Tamworth	Wishaw
A4092 road	Tonyrefail	Llangeinor
A4093 road	Rhondda	Llangeinor
A4094 road	Loudwater	Maidenhead
A4095 road	Faringdon	Bicester	Bladon Air Accident occurred near the A4095.
A4097 road	Minworth	Kingsbury
A4098 road	Moxley	Wednesbury
A4099 road	Halesowen	Blackheath

Four-digit roads (41xx)

Road	From	To	Notes
A4100 road	Blackheath	Brierley Hill
A4101 road	Kingswinford	Dudley
A4102 road	Amblecote		Duplicate number
A4102 road	Merthyr Tydfil	Merthyr Tydfil
A4103 road	Worcester	Hereford
A4104 road	Little Malvern	Pershore
A4106 road	Bridgend	Porthcawl
A4107 road	Bwlch y Clawdd	Port Talbot
A4109 road	Aberdulais	Glynneath
A4110 road	Leintwardine	Hereford
A4111 road	Willersley	Kington
A4112 road	Tenbury Wells	Eardisley
A4113 road	Bromfield	Knighton
A4114 road	Allesley	Willenhall
A4115 road	Templeton	Cross Hands
A4117 road	Near Bewdley	Ludlow	Passes Titterstone Clee Hill at 381 metres above sea level.
A4118 road	Dyfatty Street, Swansea	Port Eynon
A4119 road	Tonypandy	Cardiff Bay	Originally began at Llwynypia but following the completion of the Porth Relief road the road became part of the A4058 Treorchy to Pontypridd route.
A4120 road	Llanbadarn Fawr, Aberystwyth	Ponterwyd	It runs parallel with the A44, but on the other side of the Rheidol Valley.
A4123 road	Wolverhampton	Harborne (Birmingham)
A4124 road	Wolverhampton	Brownhills
A4125 road	Northwood	Bushey
A4126 road	Monmore Green	Coseley
A4127 road	Heston	Wembley
A4128 road	High Wycombe	Great Missenden
A4129 road	Princes Risborough	Thame
A4130 road	Burchetts Green	Rowstock	The section of road between Milton Hill and Rowstock was formerly part of the A34.
A4133 road	Great Witley	Droitwich Spa
A4135 road	Tetbury	Slimbridge
A4136 road	Huntley, Gloucestershire	Monmouth	Both ends link to A40 - goes through Forest of Dean
A4137 road	Marston	St Owen's Cross
A4138 road	Pontardulais	Llanelli
A4139 road	Tenby	Pembroke Dock
A4140 road	Wembley	Bushey Heath	Salmon Street, Fryent Way, Honeypot Lane, Marsh Lane. North of Stanmore Broadway as Stanmore Hill and The Common.
A4141 road	Solihull	Five Ways
A4142 road	Heyford Hill, Oxford	Headington	Part of the Oxford Ring Road
A4143 road	Llanfoist	Abergavenny
A4144 road	Pear Tree, Oxford	Redbridge Park and Ride
A4145 road	Watford	Rickmansworth
A4146 road	Milton Keynes	Hemel Hempstead
A4147 road	Hemel Hempstead	St Albans
A4148 road	Bescot	Bescot	Walsall Ring Road
A4150 road			Wolverhampton Ring Road
A4151 road	A49 at Elton, Gloucestershire	A4136 at Nailbridge	Through the Forest of Dean, main town on this road is Cinderford
A4154 road	Amersham	Amersham on the Hill
A4155 road	Bourne End	Reading	By way of Little Marlow, Marlow, Medmenham, Henley-on-Thames, Lower Shiplake and Caversham
A4156 road	Aylesbury	Aylesbury	Part of Oxford Road, connects A413 and A418.
A4157 road	Aylesbury	Quarrendon	Aylesbury outer ring road
A4158 road	Oxford	Iffley
A4159 road	Bow Street, Aberystwyth	A44	Acts as a by-pass around the northern part of Aberystwyth.
A4160 road	Newport Road, Cardiff	Llandough
A4161 road	Ely Bridge, Cardiff	Southern Way, Cardiff	Runs along a part of the old A48
A4162 road	Sea Mills	Westbury-on-Trym
A4165 road	Oxford	Kidlington	Banbury Road
A4167 road	Birmingham	A456
A4168 road	Woodsetton	Dudley
A4169 road	Shifnal	Much Wenlock	The section immediately south of Shifnal was turnpiked in 1763 as one of a number of roads from Stafford and Newport, but leaves this turning sharply westwards, along a road formerly part of the Madeley turnpikes. It ends when reaches the present A442 road, but resumes a short distance further north, becoming a southern bypass for Telford. It then crosses Buildwas Bridge and runs to Much Wenlock.
A4171 road	Cainscross	Badbrook
A4172 road	Preston Cross	Trumpet
A4173 road	Stroud	Gloucester
A4174 road	Filton	Bedminster Down, Bristol	The Bristol Ring Road
A4175 road	A4 / A4174 at Hicks Gate	Staple Hill	In two parts: Hick's Gate to A420 at Bridgeyate via Keynsham, and A4174 at Siston to Staple Hill
A4176 road	A4 at Hotwells	A4018 at Blackboy Hill	Bridge Valley Road and Upper Belgrave Road, Bristol
A4177 road	Meer End	Warwick
A4178 road	Oxhey	Watford
A4180 road	Yeading	Northwood	Starts at the White Hart Roundabout in Yeading at a junction with the A312. The section between this roundabout and the Polish War Memorial used to be the B455 but was "double-upgraded" to primary route status when the A312 Parkway bypass was built during the mid-1990s. Then becomes West End Road, High Street (Ruislip), Bury Street and Ducks Hill Road heading north towards the A404 Rickmansworth Road.
A4182 road	West Bromwich	West Bromwich
A4183 road	Abingdon	Lodge Hill	Oxford Road, Abingdon. This road was formerly part of the A34. The remaining part of the road between Lodge Hill and Hinksey Hill near Oxford has since been unclassified.
A4184 road	Evesham	Evesham
A4185 road	Rowstock	Chilton	This road was formerly part of the A34.
A4189 road	Redditch	Warwick
A4196 road	West Bromwich	Wednesbury

Four-digit roads (42xx and higher)

Road	From	To	Notes
A4200 road	Central London (Aldwych)	Mornington Crescent, Camden	Kingsway, Southampton Row, Woburn Place and Eversholt Street, runs through Russell Square and Tavistock Square
A4201 road	Central London (Piccadilly Circus)	Regent's Park	Regent Street and Portland Place, then north of the Marylebone Road as Albany Street
A4202 road	Hyde Park Corner	Marble Arch	Park Lane, part of the London Inner Ring Road
A4204 road	Kensington	Notting Hill Gate	Kensington Church Street
A4205 road	Edgware Road station	Bishops Bridge, Paddington
A4206 road	Notting Hill Gate	Paddington Basin
A4207 road	Westbourne Grove	Westbourne Park
A4208 road	Ludgate Circus	Holborn Circus	St Bride Street is closed off to traffic (except pushbikes) and Stonecutter Street is exit only.
A4209 road	Edgware Road station	Lancaster Gate	Sussex Gardens
A4212 road	Bala	Trawsfynydd
A4213 road	Carmarthen
A4214 road	Llanelli	Hendy
A4215 road	Libanus	Defynnog
A4216 road	Sketty	Gendros
A4217 road	Swansea	Llansamlet
A4218 road	Tenby	Tenby
A4219 road	Scleddau	Manorowen
A4221 road	Banwen	Abercraf
A4222 road	Cowbridge	Talbot Green
A4224 road	Abercynon	Aberdare
A4226 road	Bonvilston	Cardiff Airport
A4229 road	Pyle	Porthcawl
A4230 road	Llansamlet	Aberdulais
A4231 road	Biglis	Pencoedtre
A4232 road	M4 Junction 30 Cardiff East	M4 Junction 33 Cardiff West	Cardiff Link Road (Peripheral Distribution Road)
A4233 road	Tonyrefail	Aberdare
A4234 road	Adam Street, Cardiff	Queensgate Roundabout, Cardiff	Central Link Road of the Peripheral Distribution Road
A4240 road	Penllergaer	Loughor
A4241 road	Port Talbot	Baglan	Port Talbot southern distributor road
A4242 road	Carmarthen	Carmarthen
A4243 road	Carmarthen	Carmarthen
A4244 road	Brynrefail	Glasinfryn	Reclassified from parts of B4366 and B4547
A4251 road	Kings Langley	Near Tring
A4252 road	West Bromwich	Smethwick
A4254 road	Chilvers Coton	Horeston Grange	Nuneaton Eastern Relief Road
A4256 road	Drayton	Daventry Reservoir
A4259 road	Swindon	Wanborough
A4260 road	Banbury	near Pear Tree, Oxford
A4289 road	Swindon	Swindon
A4300 road	Kettering	Kettering
A4302 road	Gloucester	Gloucester
A4303 road	Cross in Hand, A5	Junction 20 of M1	Lutterworth southern by-pass; serves Magna Park distribution centre; dualled for entire length
A4304 road	Junction 20 of M1	Market Harborough
A4311 road	Swindon	Swindon
A4312 road	Swindon	Swindon
A4313 road	Swindon	Walcot
A4135 road	Tetbury	Near M5 motorway
A4320 road	Arno's Vale	M32 Junction 3
A4361 road	Beckhampton	Swindon
A4400 road			Birmingham Inner Ring Road
A4440 road	Worcester	Worcester
A4421 road	Bicester	Finmere
A4444 road	Bilston	Moxley
A4500 road	Northampton	Wellingborough	Formerly A45. Runs from M1 junction 16 to A509 Wellingborough ring road
A4501 road	Northampton	Northampton
A4508 road	Billing	Kingsthorpe
A4535 road	Kidderminster	Kidderminster
A4536 road	Fernhill Heath	A38
A4538 road	Spetchley	Martin Hussingtree
A4540 road			Birmingham Middle Ring Road
A4600 road	M69 Junction 2	Coventry	formerly part of the A46
A4601 road	Cannock	Cannock
A4810 road	Newport SDR	M4 Junction 23A	Classified A4810 on September 2013 when opened to the public
A4971 road	Minffordd, Gwynedd	Porthmadog	Designated October 2011; formerly part of the A487