- 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).
Contents
Single- and double-digit roads
Road From To Notes 
A4 roadCity of London (Holborn Circus) Avonmouth Originally London to Bath 
A40 roadCity of London (near St. Paul's Cathedral) Fishguard The longest A road in Zone 4 at 256 miles long 
A41 roadCentral London (near Marble Arch) Birkenhead 
A42 roadAppleby Magna Diseworth A continuation of the M42, hence the use of A42 despite the road being entirely within Zone 5. 
A43 roadM40 motorway Junction 10 north of Bicester Stamford 
A44 roadOxford Aberystwyth Officially the most dangerous road in Wales between Aberystwyth and Llangurig. 
A45 roadBirmingham Near Thrapston 
A46 roadBath Cleethorpes 
A47 roadBirmingham Great Yarmouth 
A48 roadHighnam near Gloucester Carmarthen Originally began in Worcester. Worcester to Newport is now A449. 
A49 roadRoss-on-Wye Bamber Bridge Triple-digit roads
Road From To Notes 
A400 roadCentral London (Trafalgar Square) Archway Takes the route of the Northern Line, Charing Cross Branch and Barnet Branch 401 Central London (Piccadilly Circus) Angel Along Shaftesbury Avenue, Bloomsbury Way, Theobald's Road, Rosebery Avenue and the northern most part of St John Street 
A402 roadCentral 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 roadM48 motorway Junction 1 near Aust Avonmouth 
A404 roadCentral London (Edgware Road station) Maidenhead The London section is called Harrow Road for most of its length. 
A405 roadLeavesden Green Near Park Street 
A406 roadGunnersbury Beckton The North Circular Road 
A407 roadHarlesden Child's Hill Through Willesden including the High Road and Cricklewood 
A408 roadHarmondsworth Uxbridge The southern section in Sipson due to be demolished to make way for Heathrow Airport 3rd runway 
A409 roadNorthwick Park Hospital Bushey through the middle of Wealdstone and the western part of Stanmore known as Stanmore Common 
A410 roadPinner Edgware Uxbridge Road, through Stanmore Broadway, then London Road and Spur Road meeting the A41 
A411 roadWatford 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 roadSlough Garston 
A413 roadGerrards Cross Towcester 
A414 roadNear Hemel Hempstead Maldon 
A415 roadBerinsfield Witney 
A416 roadAmersham Berkhamsted 
A417 roadStreatley Leominster 
A418 roadM40 motorway Junction 8a Ascott, Buckinghamshire 
A419 roadWhitminster Swindon 
A420 roadBristol Oxford 
A421 roadCroughton Wyboston 
A422 roadBedford Worcester Concurrent with the A46 between Stratford-upon-Avon and Alcester 
A423 roadHinksey Hill Coventry Small section of the road is part of the Oxford Ring Road. Reprised at Banbury. 
A424 roadBurford A44 near Bourton-on-the-Hill 
A425 roadDaventry Warwick 
A426 roadLeicester Southam 
A427 roadMarket Harborough Oundle 
A428 roadCoventry 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 roadChippenham Coventry 
A430 roadQuedgeley Longford, Gloucester 
A431 roadBristol Bath 
A432 roadBristol Old Sodbury 
A433 roadA46 at Dunkirk A429 SW of Cirencester 
A435 roadBirmingham Cirencester Concurrent with the A46 between Alcester and Teddington Hands 
A436 roadA417 near Brockworth A44 near Salford, Oxfordshire 
A437 roadHarlington, London A40 Western Avenue near Ickenham Originally Gloucester to Newport, now A48. 
A438 roadM5 motorway Junction 9 Llanfilo 
A439 roadStratford-upon-Avon A46 4 miles SW of Warwick 
A441 roadBirmingham Cookhill 
A442 roadDroitwich Whitchurch 
A443 roadWorcester Newnham Bridge 
A444 roadBaginton Burton upon Trent The original route between Coventry and Nuneaton was by-passed by dual carriageway in three phases over approximately 20 years leading up to 1995 
A445 roadWarwick A45 at Ryton-on-Dunsmore 
A446 roadLittle Packington Roughley 
A447 roadHinckley Coalville The original route through Hinckley was by-passed by a new road completed in the early 1990s 
A448 roadKidderminster Studley 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 roadNewport Stafford 
A450 roadTorton West Hagley 
A451 roadStourbridge Great Witley 
A452 roadLeamington Spa Brownhills 
A453 roadNottingham Birmingham 
A454 roadBridgnorth 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 roadBirmingham Woofferton The section through Halesowen was renumbered when the by-pass opened in the 1960s 
A457 roadBirmingham Sedgley The original route through Smethwick town centre was renumbered when a by-pass opened in about 1970 
A458 roadMallwyd 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 roadHalesowen 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 roadWolverhampton Rugeley The section through the centre of Cannock was renumbered in 1989 when the town's by-pass opened. 
A461 roadLichfield Stourbridge Concurrent with the A41 between Wednesbury & Great Bridge 
A462 roadWednesbury Laney Green The section through Darlaston town centre became unclassified when a new by-pass opened in the late 1960s 
A463 roadWombourne Willenhall The section beyond Coseley was either renumbered or became unclassified when the Black Country Route was completed between 1986 and 1995 
A464 roadOaken Hollinswood 
A465 roadBromyard M4 motorway, Llandarcy 
A466 roadKingsthorne Chepstow 
A467 roadDuffryn, Newport A465, Brynmawr 
A468 roadBassaleg, Newport A470, Nantgarw 
A469 roadA4161, Roath, Cardiff A465, Rhymney 
A470 roadCardiff Llandudno Originally Cardiff to Brecon. 
A472 roadTreharris Usk 
A473 roadPontypridd 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 roadBriton Ferry Ammanford 
A475 roadNewcastle Emlyn Lampeter 
A476 roadLlanelli Llandeilo 
A477 roadSt Clears Johnston 
A478 roadCardigan Tenby 50px 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 50px A480 road A44 at Lyonshall A438 west of Hereford 
A482 roadAberaeron Llanwrda 
A483 roadSwansea Chester 
A484 roadCardigan Cadle near Swansea by way of Newcastle Emlyn, Carmarthen and Llanelli 
A485 roadTanerdy Llanfarian 
A486 roadNew Quay A484 near Saron 
A487 roadHaverfordwest Bangor 
A488 roadPenybont Shrewsbury 
A489 roadCraven Arms Machynlleth 
A490 roadChurchstoke Llanfyllin 
A491 roadLydiate Ash Wall Heath 
A493 roadMachynlleth Dolgellau Via Tywyn 
A494 roadQueensferry Dolgellau Extension to M56 motorway opened late 2008. 
A495 roadWhitchurch The A458 near Llanfair Caereinion By-passes Oswestry as part of the A483 
A496 roadLlanelltyd Blaenau Ffestiniog Via Barmouth 
A497 roadPorthmadog Nefyn 
A498 roadPen-y-Gwryd Porthmadog 
A499 roadA487 Abersoch Four-digit roads (40xx)
Road From To Notes 
A4000 roadActon Town Harlesden 
A4001 roadHanwell Hanwell 
A4002 roadHarlesden Harlesden Tubbs Road / Nightingale Road one-way system 
A4003 roadBrondesbury Willesden Willesden Lane 
A4004 roadHarlesden Harlesden 
A4005 roadWest London (Hanger Lane gyratory) Roxeth 
A4006 roadHarrow West Hendon Also known as Kenton Road and Kingsbury Road 
A4007 roadIver Heath Uxbridge 
A4008 roadHatch End Watford 
A4010 roadHigh Wycombe Aylesbury 
A4012 roadHusborne Crawley A4146 
A4013 roadKingsditch Benhall 
A4014 roadPershore A449 near Little Malvern 
A4015 roadCheltenham Cheltenham 
A4017 roadKingswood A4174 at Bromley Heath Soundwell Road 
A4018 roadBristol Cribbs Causeway 
A4019 roadCoombe Hill Cheltenham 
A4020 roadShepherds Bush Denham Known as the Uxbridge Road for most of its length (with short stretches known by other names). 
A4023 roadRedditch 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 roadStourport-on-Severn A449 
A4026 roadSutton Coldfield Little Aston 
A4029 roadEdgbaston Edgbaston Pebble Mill Road, dual carriageway, formerly home to the BBC Pebble Mill Studios. 
A4030 roadBearwood Smethwick 
A4031 roadSmethwick Walsall 
A4032 roadBristol Bristol Continuation of M32 motorway to A4044 inner ring road 
A4033 roadDudley Oldbury 
A4034 roadQuinton West Bromwich 
A4036 roadDudley Pedmore 
A4037 roadWednesbury Dudley 
A4038 roadWalsall Moxley 
A4039 roadBilston Penn, West Midlands 
A4040 roadBirmingham Outer ring road 
A4041 roadWest Bromwich Streetly 
A4042 roadAbergavenny A48, Newport 
A4043 roadBlaenavon B4246 Pontypool, A472 
A4044 roadRedcliffe, Bristol St James Barton, Bristol Inner ring road: Redcliffe Way, Temple Way, Bond Street 
A4046 roadA465, Rassau A467, Aberbeeg 
A4047 roadA4048, Tredegar A465, Brynmawr 
A4048 roadA467, Crosskeys A465, Tredegar 
A4049 roadA4048, Pontllanfraith A469, New Tredegar 
A4050 roadA4232, Culverhouse Cross, Cardiff A4055, Barry 
A4051 roadNewport North Cwmbran 
A4053 roadCoventry Ring Road 
A4054 roadA4119, Llandaff, Cardiff A470, Cefn-Coed-y-Cymmer 
A4055 roadA4232, Cardiff Bay, Cardiff Barry Island, Barry 
A4058 roadA470, 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 roadA470, Abercynon A470, Between Brecon and Cefn-Coed-y-Cymmer 
A4060 roadA470, Pentrebach A465, Dowlais Top 
A4061 roadBridgend Hirwaun 
A4063 roadBridgend Cymer 
A4064 roadSam Blaengarw 
A4065 roadTondu Brynmenyn 
A4066 roadSt Clears Pendine 
A4067 roadWest Cross, Swansea Sennybridge 
A4068 roadGurnos Brynamman 
A4069 roadLlandovery Gwaun-Cae-Gurwen 
A4071 roadDunsmore Heath Rugby 
A4074 roadIffley Caversham Links Reading with Oxford 
A4075 roadCanaston Bridge Pembroke 
A4076 roadHaverfordwest Milford Haven 
A4077 roadCrickhowell Gilwern & Goviton 
A4078 roadTalgarth Three Cocks 
A4079 roadThree Cocks Llyswen 
A4080 roadMenai Bridge A55 
A4081 roadLlandrindod Wells Newbridge-on-Wye 
A4082 roadWhitley, Coventry Binley, Coventry Allard Way 
A4085 roadMinffordd Caernarfon 
A4086 roadCapel Curig Caernarfon 
A4087 roadBangor Bangor 
A4088 roadWillesden Sudbury, London 
A4089 roadAlperton Wembley Park 
A4090 roadWembley North Harrow 
A4091 roadTamworth Wishaw 
A4092 roadTonyrefail Llangeinor 
A4093 roadRhondda Llangeinor 
A4094 roadLoudwater Maidenhead 
A4095 roadFaringdon Bicester Bladon Air Accident occurred near the A4095. 
A4097 roadMinworth Kingsbury 
A4098 roadMoxley Wednesbury 
A4099 roadHalesowen Blackheath Four-digit roads (41xx)
Road From To Notes 
A4100 roadBlackheath Brierley Hill 
A4101 roadKingswinford Dudley 
A4102 roadAmblecote Duplicate number A4102 roadMerthyr Tydfil Merthyr Tydfil 
A4103 roadWorcester Hereford 
A4104 roadLittle Malvern Pershore 
A4106 roadBridgend Porthcawl 
A4107 roadBwlch y Clawdd Port Talbot 
A4109 roadAberdulais Glynneath 
A4110 roadLeintwardine Hereford 
A4111 roadWillersley Kington 
A4112 roadTenbury Wells Eardisley 
A4113 roadLudlow Knighton 
A4114 roadAllesley Willenhall 
A4115 roadTempleton Cross Hands 
A4117 roadNear Bewdley Ludlow Passes Titterstone Clee Hill at 381 metres above sea level. 
A4118 roadDyfatty Street, Swansea Port Eynon 
A4119 roadTonypandy 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 roadLlanbadarn Fawr, Aberystwyth Ponterwyd It runs parallel with the A44, but on the other side of the Rheidol Valley. 
A4123 roadWolverhampton Harborne (Birmingham) 
A4124 roadWolverhampton Brownhills 
A4125 roadNorthwood Bushey 
A4126 roadMonmore Green Coseley 
A4127 roadHeston Wembley 
A4128 roadHigh Wycombe Great Missenden 
A4129 roadPrinces Risborough Thame 
A4130 roadBurchetts Green Rowstock The section of road between Milton Hill and Rowstock was formerly part of the A34. 
A4133 roadGreat Witley Droitwich Spa 
A4135 roadTetbury Slimbridge 
A4136 roadHuntley, Gloucestershire Monmouth Both ends link to A40 - goes through Forest of Dean 
A4137 roadMarston St Owen's Cross 
A4138 roadPontardulais Llanelli 
A4139 roadTenby Pembroke Dock 
A4140 roadWembley Bushey Heath Salmon Street, Fryent Way, Honeypot Lane, Marsh Lane. North of Stanmore Broadway as Stanmore Hill and The Common. 
A4141 roadSolihull Five Ways 
A4142 roadHeyford Hill, Oxford Headington Part of the Oxford Ring Road 
A4143 roadLlanfoist Abergavenny 
A4144 roadPear Tree, Oxford Redbridge Park and Ride 
A4145 roadWatford Rickmansworth 
A4146 roadMilton Keynes Hemel Hempstead 
A4147 roadHemel Hempstead St Albans 
A4148 roadBescot Bescot Walsall Ring Road 
A4150 roadWolverhampton Ring Road 
A4151 roadA49 at Elton, Gloucestershire A4136 at Nailbridge Through the Forest of Dean, main town on this road is Cinderford 
A4154 roadAmersham Amersham on the Hill 
A4155 roadBourne End Reading By way of Little Marlow, Marlow, Medmenham, Henley-on-Thames, Lower Shiplake and Caversham 
A4156 roadAylesbury Aylesbury Part of Oxford Road, connects A413 and A418. 
A4157 roadAylesbury Quarrendon Aylesbury outer ring road 
A4158 roadOxford Iffley 
A4159 roadBow Street, Aberystwyth A44 Acts as a by-pass around the northern part of Aberystwyth. 
A4160 roadNewport Road, Cardiff Llandough 
A4161 roadEly Bridge, Cardiff Southern Way, Cardiff Runs along a part of the old A48 
A4162 roadSea Mills Westbury-on-Trym 
A4165 roadOxford Kidlington Banbury Road 
A4167 roadBirmingham A456 
A4168 roadWoodsetton Dudley 
A4169 roadShifnal Much Wenlock 
A4171 roadCainscross Badbrook 
A4172 roadPreston Cross Trumpet 
A4173 roadStroud Gloucester 
A4174 roadFilton Bedminster Down, Bristol The Bristol Ring Road 
A4175 roadA4 / 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 roadA4 at Hotwells A4018 at Blackboy Hill Bridge Valley Road and Upper Belgrave Road, Bristol 
A4177 roadMeer End Warwick 
A4178 roadOxhey Watford 
A4180 roadYeading 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 road|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 roadWest Bromwich West Bromwich 
A4183 roadAbingdon 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 roadEvesham Evesham 
A4185 roadRowstock Chilton This road was formerly part of the A34. 
A4189 roadRedditch Warwick 
A4196 roadWest Bromwich Wednesbury Four-digit roads (42xx and higher)
Road From To Notes 
A4200 roadCentral London (Aldwych) Mornington Crescent, Camden Kingsway, Southampton Row, Woburn Place and Eversholt Street, runs through Russell Square and Tavistock Square 
A4201 roadCentral London (Piccadilly Circus) Regent's Park Regent Street and Portland Place, then north of the Marylebone Road as Albany Street 
A4202 roadHyde Park Corner Marble Arch Park Lane, part of the London Inner Ring Road 
A4204 roadKensington Notting Hill Gate Kensington Church Street 
A4205 roadEdgware Road station Bishops Bridge, Paddington 
A4206 roadNotting Hill Gate Paddington Basin 
A4207 roadWestbourne Grove Westbourne Park 
A4208 roadLudgate Circus Holborn Circus St Bride Street is closed off to traffic (except pushbikes) and Stonecutter Street is exit only. 
A4209 roadEdgware Road station Lancaster Gate Sussex Gardens 
A4212 roadBala Trawsfynydd 
A4213 roadCarmarthen 
A4214 roadLlanelli Hendy 
A4215 roadLibanus Defynnog 
A4216 roadSketty Gendros 
A4217 roadSwansea Llansamlet 
A4218 roadTenby Tenby 
A4219 roadScleddau Manorowen 
A4221 roadBanwen Abercraf 
A4222 roadCowbridge Talbot Green 
A4224 roadAbercynon Aberdare 
A4225 roadPorth Trehafod 
A4226 roadBonvilston Cardiff Airport 
A4229 roadPyle Porthcawl 
A4230 roadLlansamlet Aberdulais 
A4231 roadBiglis Pencoedtre 
A4232 roadM4 Junction 30 Cardiff East M4 Junction 33 Cardiff West Cardiff Link Road (Peripheral Distribution Road) 
A4233 roadTonyrefail Aberdare 
A4234 roadAdam Street, Cardiff Queensgate Roundabout, Cardiff Central Link Road of the Peripheral Distribution Road 
A4240 roadPenllergaer Loughor 
A4241 roadPort Talbot Baglan Port Talbot southern distributor road 
A4242 roadCarmarthen Carmarthen 
A4243 roadCarmarthen Carmarthen 
A4244 roadBrynrefail Glasinfryn Reclassified from parts of B4366 and B4547 
A4251 roadKings Langley Near Tring 
A4252 roadWest Bromwich Smethwick 
A4254 roadChilvers Coton Horeston Grange Nuneaton Eastern Relief Road 
A4256 roadDrayton Daventry Reservoir 
A4259 roadSwindon Wanborough 
A4260 roadBanbury near Pear Tree, Oxford 
A4289 roadSwindon Swindon 
A4300 roadKettering Kettering 
A4302 roadGloucester Gloucester 
A4303 roadCross in Hand, A5 Junction 20 of M1 Lutterworth southern by-pass; serves Magna Park distribution centre; dualled for entire length 
A4304 roadJunction 20 of M1 Market Harborough 
A4311 roadSwindon Swindon 
A4312 roadSwindon Swindon 
A4313 roadSwindon Walcot A4135 roadTetbury Near M5 motorway 
A4320 roadArno's Vale M32 Junction 3 
A4361 roadBeckhampton Swindon 
A4400 roadBirmingham Inner Ring Road 
A4440 roadWorcester Worcester 
A4421 roadBicester Finmere 
A4444 roadBilston Moxley 
A4500 roadNorthampton Wellingborough Formerly A45. Runs from M1 junction 16 to A509 Wellingborough ring road 
A4501 roadNorthampton Northampton 
A4508 roadBilling Kingsthorpe 
A4535 roadKidderminster Kidderminster 
A4536 roadFernhill Heath A38 
A4538 roadSpetchley Martin Hussingtree 
A4540 roadBirmingham Middle Ring Road 
A4600 roadM69 Junction 2 Coventry formerly part of the A46 
A4601 roadCannock Cannock Roads in the United Kingdom Articles - Road numbering schemes: Great Britain
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