- A40 road
: "For other uses, see
A40, for details of the A40 in london, see A40 road (London)".UK road routebox
Holborn Viaductcarries the A40
direction= East - West (London Radial)
City of London
Uxbridge Beaconsfield High Wycombe Oxford Cheltenham Gloucester Ross-on-Wye Monmouth Abergavenny Brecon Carmarthen Haverfordwest
A40 road (London)"ukroadsmall|1
ukmotorwaysmall|40 Junction 1
ukmotorwaysmall|40 Junction 3 (northbound only)
ukmotorwaysmall|40 Junction 5
ukmotorwaysmall|40 Junction 8 (northbound only, to Oxford on (A40) only) & 8A
ukmotorwaysmall|5 Junction 11
euroroute= European route number small sign|30
The A40 is a major
trunk roadconnecting Londonto Fishguard, Wales. It is 256 miles long.
It is one of the few remaining of the "old" trunk routes not to have been superseded by a direct
motorwaylink, though some parts, such as the southern section from London to Oxfordare now better served by the M40. Part of the A40 forms a section of the unsigned Euroroute E30.
The road varies from a winding country road to a motorway standard road in places:
* In central London, it forms High Holborn and
Oxford Street. "For the A40 in London, see A40 road (London)".
* At Paddington, it forms the Westway, an elevated motorway which takes the A40 to meet Western Avenue.
* With two exceptions, Western Avenue forms a grade-separated motorway standard dual-carriageway between Paddington (Westway) and the
M40 motorway, which goes off towards Oxfordand Birmingham. The two exceptions are Gypsy Corner and Savoy Circus, both of which cause the traffic to stop at traffic lights. For the greater part, the road is six lanes wide, with stretches of four lane road.
Denham Roundabout, the six lane Western Avenue becomes the M40. The A40 then follows the motorway, using the dual carriageway of the A413.
* A few miles later, the dual carriageway bends away as the A413. The A40 then becomes a single carriageway winding its way through
Buckinghamshireand Oxfordshire. It passes along many town centres such as High Wycombeand Beaconsfield, becoming dual carriageway for brief periods whilst in the towns.
* The A40 follows the M40 for 25 miles, meeting it at M40 J1,3,5 and 8A. At junction 8A, the A40 meets the motorway for the last time. At the end of the M40 Oxford spur, the A40 takes over with a dual carriageway towards
Oxford, forming the northern part of the Oxford Ring Road. Some of the junctions are grade separated, although most are roundabouts.
* After the road passes under the A34(no junction), the A40 reverts back to single carriageway for ten miles. It then turns to dual carriageway again to form the
Witneybypass, with a grade separated junction. The dual carriageway then finishes at a roundabout.
* For the rest of
Oxfordshireand Gloucestershireuntil Cheltenham, the road is single carriageway. The road travels through Cheltenham city centre and afterwards becomes dual carriageway and has a junction with the M5 motorway. The junction is a three-level stacked roundabout, where neither road is interrupted. The A40 then forms the Gloucesterbypass, most of which is dual carriageway.
* For the rest of Gloucestershire, and a part of
Herefordshire, the road is single carriageway until Ross-on-Wye. It then connects with the M50 motorway. After this, forms part of a high quality dual carriageway between South Walesand the Midlands, with only one roundabout and numerous grade-separated junctions.
Monmouthshire, the A40 has a grade separated junction with the A449, which continues as dual carriageway to Newportand the M4. The A40 now travels west, still as dual carriageway to Abergavenny.
* After the town, the road returns to single carriageway, for a trip through the
Brecon Beacons. This stretch of road lasts fifty miles to Carmarthen, where dual carriageway resumes for fifteen miles to St. Clears. After this, the road remains as single carriageway for the rest of way to Fishguard.
There is call for the stretch between
Haverfordwestand St. Clearsto be dualled. This would then allow for a dual carriageway all the way from London (via the M4 and A48) to Haverfordwest. This stretch currently has to handle all traffic going to/from the ferry port at Fishguardto Rosslare, and is very busy. The dualling would relieve this congestion. Fact|date=August 2008
The route passes through the following places in order:
* In central London:
** The road begins as
Newgate Streetin the City of Londonwhere at St. Martin's le Grandit shares its terminus with the A1 north of St. Paul's Cathedral.
** For the majority of its length in Central London it runs in a westerly direction, becoming in turn:
*** St Giles High Street
New Oxford Street
Oxford Street(to Marble Arch).
** From Marble Arch, the route previously ran along:
Notting Hill Gate
*** Holland Park Avenue
*** Uxbridge Road
Wood Laneto the junction with The Westway
** However, since
2000when the designation of the elevated section of the Westway to Paddingtonwas reduced from A40(M) ( motorway) to A40, the route has changed to run from Marble Arch along:
Edgware Road(shared with and signposted as A5)
*** The Westway
** to Savoy Circus (so called because it was once a roundabout) where the name changes to
Western Avenueas far as the Denham Roundaboutwhere it meets the western extremity of the A4020 road (the old Uxbridge Road) and the start of the M40.
Oxford— part of the Oxford Ring Road.
Abergavenny- From Here there are links for Merthyr Tydfilvia the A465, Newportand M4 via the A4042 and Herefordvia the A465.
Brecon— the A40 continues from the west side of Brecon for 8 miles to Sennybridge. There are links here to Merthyr Tydfil/ Brecon Beacons(A470) via the A4215 and to Swanseavia the A4067.
Llandovery— link for the A483 to Builth Wells.
Llanwrda— link for the A482 to Lampeter.
Carmarthen- From Here there are links to Lampetervia the A485, Cardiganand Newcastle Emlynvia the A484 and The M4and Swanseavia the A48.
History of the road number
The original (1923) route of the A40 was the City of London to Fishguard. The road still begins and ends in the same places, but a number of changes have been made to its route. [ [http://www.road-to-nowhere.co.uk/route-guides/A40.htm] Road to Nowhere: A40 Ross-on-Wye to Abergavenny]
The first change dates from 1935, between
Ross-on-Wyeand Abergavenny. The original route of the A40 was via Skenfrith; this road was renumbered the B4521. The A40 was rerouted via Raglan; between Ross and Raglan it replaced part of the A48, between Raglan and Llanvihangel nigh Usk it replaced the B4234, and between Llanvihangel and Abergavenny it replaced part of the A471.
Subsequently, the A40 was rerouted within west London. Western Avenue dates from the 1930s, but was originally opened as the A403. After the Second World War, the A40 was rerouted along part of the A219 (west of Notting Hill) and Western Avenue. The old route (via Acton, Ealing, Southall,Hayes, Hillingdon and Uxbridge) was renumbered the A4020.
British road numbering scheme
* Edward Platt, "Leadville: A Biography of the A40" (Picador, 2001). ISBN 0-330-39263-8.
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