A40 road

For the A40 in London, see A40 road (London). For other uses, see A40 (disambiguation).

A40 shield
A40
Holborn Viaduct December 2005.jpg
Holborn Viaduct carries the A40
Route information
Part of E30
Maintained by National Highways, English local authorities, South Wales Trunk Road Agent and North & Mid Wales Trunk Road Agent
Length261.2 mi[1][2][3] (420.4 km)
Major junctions
East end A1 / A1121 in City of London
Major intersections
see also: A40 road (London)

A5 in Greater London
M40 in Greater London
A34 / A44 near Oxford
M5 near Cheltenham
A38 in Gloucester
A48 near Gloucester
A49 at Bridstow

West endGoodwick (Fishguard)
Location
CountryUnited Kingdom
CountiesEngland:
Greater London, Buckinghamshire, Oxfordshire, Gloucestershire, Herefordshire
Wales:
Monmouthshire, Powys, Carmarthenshire
Primary
destinations		London, Beaconsfield, High Wycombe, Oxford, Cheltenham, Gloucester, Ross-on-Wye, Monmouth, Abergavenny, Brecon, Llandovery, Llandeilo, Carmarthen, Haverfordwest, Fishguard
Road network
← A39→ A41

The A40 is a trunk road which runs between London and Goodwick (Fishguard), Wales, and officially called The London to Fishguard Trunk Road (A40) in all legal documents and Acts. Much of its length within England has been superseded by motorways, such as the M40, and has lost its trunk road status, though it retains it west of Gloucester, including its length within Wales. It is approximately 260 miles (420 km) long. The eastern section from Denham, Buckinghamshire to Wheatley, Oxfordshire is better served by the M40 and its former function of linking London with Cheltenham and Gloucester has been taken by the M4, A419 and A417 via Swindon.

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