A roads in Zone 4 of the Great Britain numbering scheme
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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; most of it is now the 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 |
 A47 road |
Birmingham | Great Yarmouth | Most of the section between Birmingham and Nuneaton now de-classified to B-roads |
 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 |
 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 A483 |
 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)
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)
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