A40/Abergavenny - Brecon

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A40
Cameraicon.png View gallery (2)
From:  Abergavenny (SO303128)
To:  Brecon (SO031283)
Meets:  A465, A4042, B4233, B4521, B4246, A4143, A4077, A479, B4560, B4558, A470, B4601
Old route now:  B4601
Highway Authorities

North and Mid Wales Trunk Road Agent • South Wales Trunk Road Agent

Counties

Brecknockshire • Monmouthshire

Route outline (key)
Arrowwest.jpg West Brecon - Carmarthen
A40 Abergavenny – Brecon
East Arroweast.jpg Ross - Abergavenny

From Abergavenny the A40 strikes north-west into the Brecon Beacons National Park. In spite of the hilly surroundings, the road itself remains reasonably flat, mostly following the valley of the River Usk. At a point some 2.5 km beyond Crickhowell, however – where the Rhiangoll (a small river in a large glacial valley) flows in from the north – the A479 branches off to the right, taking traffic up the east side of the side valley towards Talgarth (and eventually Builth), and we, too, desert the Usk, if only temporarily, to follow the opposite, western bank of the Rhiangoll for a while. After skirting the northern flank of Myarth (a 292 m eminence which separates the A40 from the Usk), we turn sharp right to begin a steep climb to reach the col between Cefn Moel (to the north-east) and Buckland Hill (to the south-west) at the village of Bwlch (the name, appropriately enough, means "gap"). From here, having turned westward again, we descend more gently to rejoin the Usk at Llansantffraed.

1955 OS map showing the A40 at Brecon before the bypass was constructed

Our road continues on towards Brecon, a cathedral town in the heart of the National Park and home to a number of military establishments. On the final approach to the town, the A40 becomes a dual carriageway, meeting the main North Wales to South Wales artery (the A470) at a roundabout at the eastern edge of the built-up area. The A40 originally passed through the centre of Brecon but now, in tandem with the A470, it follows the dual-carriageway bypass which crosses the Usk to sweep round the south side of the town.

If the weather is kind, you will see that the road passes through the edge of the main part of the Brecon Beacons. More frequently, however, the cloud cover is such that whilst you get a feeling of being amongst mountains, their true majesty is hidden, and you have to allow your imagination to see what is there.



A40
SectionsA40/Brecon - Carmarthen • A40/Carmarthen - Haverfordwest • A40/Central London - Denham • A40/Cheltenham - Ross • A40/Denham - Wheatley • A40/Haverfordwest - Fishguard • A40/Ross - Abergavenny • A40/Wheatley - Witney • A40/Witney - Cheltenham
JunctionsAbbey Way Gyratory • Abergwili Roundabout • Arle Court Roundabout • Asthall Barrow Roundabout • Bank • Benhall Roundabout • Blackbridge Roundabout • Bridgend Square • Brynich roundabout • Burford Roundabout • Canaston Bridge Roundabout • Coxs Meadow • Cutteslow Roundabout • Denham Roundabout • Ealing Common • Eden Roundabout • Elmbridge Court Roundabout • Eynsham Roundabout • Forest Gate Junction • Gipsy Corner • Golden Valley Junction • Greenford Roundabout • Hanger Lane Gyratory • Hardwick Gyratory • Headington Roundabout • Highnam Corner • Highnam Roundabout • Hildersley Roundabout • Hillingdon Circus • Holborn Circus • Holland Park Roundabout • Holtspur Roundabout • Holtspur Temporary Terminal • Knaves Beech Interchange • Lancaster Gate Gyratory • Llanboidy Road Roundabout • Llandeilo Roundabout • London End Roundabout • Marble Arch • Marylebone Flyover • Old Beaconsfield Roundabout • Over Ross Roundabout • Over Roundabout • Oxford Circus • Paddington Interchange • Pedestal Roundabout • Penblewin roundabout • Pensarn Roundabout • Perivale • Polish War Memorial • Prendergast Roundabout • Pyebush Roundabout • Rafael roundabout • Raglan Interchange • Raglan Roundabout • Robeston Wathen Roundabout • Salutation Square • Savoy Circus • Scotchwell roundabout • Shepherds Bush Green • Square and Compass • St Giles Circus • St Pauls Gyratory • Stokenchurch Interchange • Swakeleys Roundabout • Tarell roundabout • Target Roundabout • Three Pigeons • Weston Cross • Westway Roundabout • Wheatley Interchange • Wilton Roundabout (Ross) • Windyhall roundabout • Withybush roundabout • Wolvercote Roundabout • Wood Lane
ServicesMonmouth services • Oxford services • Ross Spur services • Stokenchurch services • Symonds Yat services
CrossingsA40 Bridge • Bridstow Bridge • Carmarthen Bypass Bridge • Chain Bridge (Llandovery) • Cherwell Bridge • Fishguard - Rosslare ferry • Gibraltar Tunnels • Holborn Viaduct • Marylebone Flyover • Over Bridge • Pont Lesneven • Wheatley Bypass Bridge • Witney Bypass Bridge
RoadsA40 • A40(M) (Central London) • A40(M) (Denham - Stokenchurch) • E105 (London - Fishguard) • E30 • EuroVelo 1 • Ffordd Arfordirol • Herefordshire Cider Route • Longest Lane • NCN4 • Oxford Ring Road • T10 (Britain) • T17 (Britain) • T43 (Britain) • T75 (Britain) • T77 (Britain) • T78 (Britain) • T79 (Britain) • Watling Street
PlacesAbergavenny • Acton • Beaconsfield • Brecon • Burford • Carmarthen • Central London • Cheltenham • Fishguard • Gerrards Cross • Gloucester • Harrow • Haverfordwest • High Wycombe • Llandeilo • Llandovery • London • Monmouth • Oxford • Raglan • Ross-on-Wye • Shepherds Bush • St Clears • The City • Uxbridge • West End • Witney
MiscellaneousA40/History • A40/Named Junctions • A40/Route
Related Pictures
View gallery (324)
72. end of Westway - Coppermine - 1242.JPGA40 nears Elm Bridge Court roundabout - Geograph - 3046818.jpgAccess to the A40 south of Wheatley - Geograph - 2367500.jpgHolborn Circus - Coppermine - 13265.jpgThe A40 approaching Asthall Barrow - Geograph - 3575709.jpg
Other nearby roads
AbergavennyA40 • A4042 • A4125 (Little Mill - Abergavenny) • A4143 • A465 • A471 • B4233 • B4245 (Little Mill - Abergavenny) • B4247 (Monmouthshire) • B4269 • B4521 • B4598 • EuroVelo 2 • T17 (Britain) • T76 (Britain) • T77 (Britain)
BreconA40 • A4059 • A4062 (Brecon) • A438 • A470 • B4520 • B4557 (Brecon) • B4558 • B4559 • B4601 • B4602 • Ffordd Cambria • NCN8 • T75 (Britain) • T77 (Britain)