A roads in Zone 4 of the Great Britain numbering scheme

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

Single- and double-digit roads

Road	From	To	Notes
	City of London	Avonmouth	Originally London to Bath
	City of London	Fishguard	The longest A road in Zone 4 at 256 miles long
	Central London	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. A41 rerouted along new dual carriageway, Black Country New Road, between West Bromwich and Wednesbury. Old route through Hill Top renumbered A4196.
	Kegworth	Appleby Magna	A continuation of the M42, hence the use of A42 despite being entirely in Zone 5. Previously allocated to a road from Reading to Birmingham; this became part of the A329, the A423, and the A34.
	M40 motorway Junction 10 north of Bicester	Stamford	Formerly continued along present route of B430.
	Oxford	Aberystwyth	Officially the most dangerous road in Wales between Aberystwyth and Llangurig. Route between Evesham and A422 originally designated A4538.
	Birmingham	Thrapston	Previously continued along route of current A14 to Felixstowe
	Bath	Cleethorpes	The section from Cheltenham to Heath End 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 Teddington also became part of the A46.
	Birmingham	Lowestoft	The original section between Birmingham and Nuneaton has mostly been now de-classified to B-roads, while the section between Nuneaton and Leicester via Hinckley has been largely de-trunked since the M69 runs a similar route. A12 from Great Yarmouth to Lowestoft redesignated as A47 in 2017.
	Highnam near Gloucester	Carmarthen	Originally began in Worcester. Worcester to Newport is now A449.
	Ross-on-Wye	Bamber Bridge

Triple-digit roads

Only roads that have individual articles have been linked in the "Road" column below.

Road	From	To	Notes
	Central London	Archway	Takes the route of the Northern line, Charing Cross Branch and High Barnet Branch
	Central London	Angel
	Central London	Stamford Brook, Chiswick
	M48 motorway, _{J1 near Aust}	Avonmouth	A road of the same number ran down Western Avenue, London until 1946 when the A40 was diverted along the route.
	Central London	A404 Junction 9B near Maidenhead	The London section is called Harrow Road for most of its length. Originally ran through Pinner, but now by-passes it using parts of the old A410 and A4090 and the old route through Pinner has now been declassified
	Leavesden Green	Near Park Street	Originally used from Gunnersbury Park to Wembley in West London. The section from Gunnersbury Park to Hanger Lane became part of the A406 North Circular Road when it opened and the route north to Sudbury Town became the A4005.
	Gunnersbury	Beckton	The North Circular Road
	Harlesden	Child's Hill	Through Willesden including the High Road and Cricklewood. Runs from the A598 to the A404. Originally used on a road from Hambrook to Downend. Now the A4174 and A4017.
	Heathrow Airport	Uxbridge	The southern section in Sipson due to be demolished to make way for Heathrow Airport 3rd runway
	Northwick Park Hospital	Bushey	through the middle of Wealdstone and the western part of Stanmore known as Stanmore Common
	Pinner	Edgware	Uxbridge Road, through Stanmore Broadway, then London Road and Spur Road meeting the A41. Original western section now part of A404
	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
	Slough	Garston	Was the main artery for this corridor and used to continue to St Albans prior to the construction of the M25. It provides interchange to the A4 in Slough, the A40/M40 at the Denham Roundabout, the M25 in Maple Cross, the A404 in Rickmansworth town centre, the A411 on a partially grade separated dual carriageway in Watford town centre, and the A41 in North Watford.
	Gerrards Cross	Towcester
	Near Hemel Hempstead	Maldon	Section from Hemel Hempstead to the Park Street Roundabout was the M10 before 2009.
	Berinsfield	Witney
	Amersham	Berkhamsted
	Streatley	Leominster
	M40 motorway _J8a	Ascott, Buckinghamshire
	Whitminster	Swindon
	Bristol	Oxford
	Croughton	Wyboston	Forms the H8 Standing Way in Milton Keynes.
	Bedford	Worcester	Concurrent with the A46 between Stratford-upon-Avon and Alcester. Forms the H3 Monks Way in Milton Keynes.
	Hinksey Hill	Coventry	Formerly ran from Maidenhead to Tamworth via Oxford and Banbury and Coventry, and a small section of this remains as part of the Oxford Ring Road. Now begins its former route at Banbury. Section beyond Coventry now B4098 and A51.
	Burford	A44 near Bourton-on-the-Hill
	Daventry	Warwick	Route between the junctions with the A452 and the A46 previously part of A41.
	Leicester	Southam
	Market Harborough	Oundle
	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.
	Chippenham	Coventry
	Quedgeley	Longford, Gloucester	Canal in Gloucester realigned in 2006 as part of A430 Western Relief Road construction. Originally used on a road between Chippenham and Bristol. Became a portion of an extended A420 in 1935.
	Bristol	Bath
	Bristol	Old Sodbury
	A46 at Dunkirk	A429 SW of Cirencester
	Unused		Used to run from the A429 near Malmesbury to the A38 near Hardwicke, south of Gloucester. Malmesbury–Nailsworth section now B4014; section north of Stroud became part of A419, now part of B4008.
	Birmingham	Cirencester	Concurrent with the A46 between Alcester and Teddington Hands
	A417 near Brockworth	A44 near Salford, Oxfordshire
	Harlington, London	A40 Western Avenue near Ickenham	Originally Gloucester to Newport; became a portion of a rerouted A48 in 1935.
	M5 motorway _{Junction 9}	A470 near Llanfilo
	Stratford-upon-Avon	A46 4 miles SW of Warwick
	Reserved		Reserved for Bristol Road. Used to run from Pershore to Great Malvern Downgraded in the 1960s, with the Pershore to Upton section becoming an extension of the A4104 and most of the reminder becoming the B4211. The westernmost section in Great Malvern itself remained Class I, becoming part of the A4532, but this was downgraded in the 2000s with the B4211 extended over it. Crossed River Severn on swingbridge in Upton-upon-Severn.
	Birmingham	Cookhill	Previously continued along present alignment of B4088.
	Droitwich	Whitchurch
	Worcester	Newnham Bridge
	Coventry	Burton upon Trent	Short gap in Coventry due to incomplete construction of Phoenix Way.
	Warwick	A45 at Ryton-on-Dunsmore
	Little Packington	Roughley
	Hinckley	Coalville	The original route through Hinckley was by-passed by a new road completed in the early 1990s
	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
	Newport	Stafford	Used to continue beyond M4. Route to M5 motorway previously A4538.
	Torton	West Hagley	Originally continued along present alignment of B4187.
	Stourbridge	Great Witley
	Leamington Spa	Brownhills	Known as Chester Road for most of route between A5 and M42. Link road between A425 and M40 J14 previously A41.
	Nottingham	Birmingham	Concurrent with A5127 in Sutton Coldfield. Part of old route reinstated as A453 to serve East Midlands Airport.
	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 renumbering took place in 1995 on the completion of the Black Country Route. Used to continue direct to Bridgnorth town centre. Rerouted along new alignment to meet A458 near Stanmore when bypass opened.
	Unused		First used from Birmingham to Stafford until 1935 when it became part of a northern extension of the A34. Next used from M4 J24 in Ringland, Newport to George Street Bridge. Became part of the A48 Southern Distributor Road in 2004 and the rest is now Corporation Road.
	Birmingham	Woofferton	The section through Halesowen was renumbered to B4183 and A458 when the by-pass opened in the 1960s. Originally started on A41 in city centre, it later started on the Inner Ring Road but now starts on the Middle Ring Road.
	Birmingham	Sedgley	The original route through Smethwick town centre was renumbered when a by-pass opened in about 1970. Also used to pass through Oldbury town centre. Has two branches in Sedgley: Tipton Road and Gate Street.
	Mallwyd	Quinton	Originally started in Cross Foxes Inn. Further renumberings have taken place over the years, notably when the town of Bridgnorth was by-passed in 1985, and when the western section became part of the A470. Section between Halesowen and Quinton previously A456.
	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. Also used to meet Ring Road in Wolverhampton but now terminates at A4123, Grove Street. Until the 1960s ran down Dudley Street in Wolverhampton. After this road was pedestrianised, followed route of B4158, B4160 and part of A460 via Garrick Street, Market Street, Princess Street and Stafford Street to Five Ways. However Stafford Street was taken over by the A449 when old A449, Waterloo Road, declassified in 1980s.
	Wolverhampton	Rugeley	The section through the centre of Cannock was renumbered A4601 in 1989 when the town's by-pass opened. Currently only link to M6 North from M54 Junction 1. Originally terminated in Princes Square in Wolverhampton.
	Lichfield	Wollaston, West Midlands	Concurrent with the A41 between Wednesbury & Great Bridge. Previously passed through Brierley Hill town centre. Old route through Dudley town centre renumbered or declassified when bypass opened in 1999. In 2008, the bypass was named Duncan Edwards Way.
	Essington	Wednesbury	The section through Darlaston town centre became unclassified when a new by-pass opened in the late 1960s
	Wombourne	Willenhall	The section beyond Coseley was either renumbered or became unclassified when the Black Country Route was completed between 1986 and 1995. Part of former route in Bilston replaced by A4039 and B4484. Concurrent with A454 between The Keyway and Armstrong Way.
	Oaken	Hollinswood	Primary route between Wolverhampton and Telford for non-motorway vehicles via Albrighton and Shifnal Originally used between Oaken and Nantwich. Renumbered to A41 from Oaken to Hinstock and A529 from there to Nantwich in 1935.
	Bromyard	M4 motorway Junction 45, Llandarcy
	King's Thorn	Chepstow
	Duffryn, Newport	A465, Brynmawr
	Bassaleg, Newport	A470, Nantgarw
	A4161, Roath, Cardiff	A465, Rhymney
	Cardiff	Llandudno	Original north end was at Brecon. Later extended north.
	Unused		Ran from Abergavenny to Usk. In 1935 the section from Abergavenny to Llanvihangel Gobion became part of a rerouted A40 and the remainder was downgraded to the B4598 in the 1970s.
	Treharris	Usk
	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.
	Briton Ferry	Ammanford
	Newcastle Emlyn	Lampeter	Originally used from Swansea to Carmarthen. Much of the route became part of a rerouted A48 and the southern section between Swansea and Penllergaer became part of the A483 in 1935.
	Llanelli	Llandeilo
	St Clears	Johnston
	Cardigan	Tenby
	Glanusk	Llyswen	Runs through the heart of the Brecon Beacons in Wales. Originally went northwest to Rhayader, but this section became part of the A470. Another A479 runs along Empire Way, Wembley ; this was formerly B4565 until 2007.
	A44 at Lyonshall	A438 west of Hereford
	Somewhere near Llanfihangel, Llandegley	Llanelwedd
	Aberaeron	Llanwrda
	Swansea	Chester	by way of Wrexham. Becomes A5 road in the vicinity of Oswestry.
	Cardigan	Cadle near Swansea	by way of Newcastle Emlyn, Carmarthen and Llanelli
	Tanerdy	Llanfarian
	New Quay	A484 near Saron
	Haverfordwest	Bangor
	Penybont	Shrewsbury
	Craven Arms	Machynlleth
	Churchstoke	Llanfyllin
	Lydiate Ash	Wall Heath	Used to terminate in Bromsgrove. Originally used between Shrewsbury and Cemmaes Road. Shrewsbury to Mallwyd became an extension of the A458 and the rest became part of a rerouted A4084 in 1935.
	Unused		Used to run from Llangurig to Newtown. Became a portion of an extended A470 while the 1935 extension into Newtown reverted back to the A489.
	Machynlleth	Dolgellau	The road is approximately 32 miles long and is next to the coast for the majority of the journey.
	Queensferry	Dolgellau	Extension to M56 motorway opened late 2008.
	A525 west of Whitchurch	A5 outside Oswestry	Previously met A483 closer to Oswestry, now truncated by Oswestry bypass.
	Llanelltyd	Blaenau Ffestiniog	Via Barmouth; originally went north to Llandudno.
	Porthmadog	Nefyn
	Pen-y-Gwryd	Porthmadog
	A487	Abersoch