Hardwick Gyratory

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Hardwick Gyratory
Gylchfan Hardwick
Location Map ( geo)
Crossed lines - Geograph - 284556.jpg
Power cables and railway bridge crossing the gyratory
Cameraicon.png View gallery (1)
SSE of Abergavenny
Highway Authority
Welsh Government
Junction Type
Roads Joined
A40, A465, A4042, B4598
Junctions related to the A4042
Caerleon Interchange • Court Farm Roundabout • Cwmbrân Roundabout • Edlogan Way Roundabout • Grove Park Interchange • Pontypool Roundabout
This article is about the gyratory between the A40, A465 and A4042 near Abergavenny.
For the roundabout near Kings Lynn between the A10, A47 and A149, see Hardwick Roundabout
For the interchange on the A428 west of Cambridge, see Hardwick Interchange.

The Hardwick Gyratory (unnamed on signs), a major interchange situated close to Abergavenny in south-east Wales, is the only junction in Wales to have trunk roads radiating from it in more than four directions.

In 1922 the site was home to a simple fork junction – lying immediately to the west of the more southerly of the two railway bridges which today span the site – between the A471 and the B4245 (which had become the A4125 by the end of the 20s). In 1935, the A4042 was extended over the A4125, and the A40 was diverted from its original route between Ross and Abergavenny by way of Skenfrith to run instead via Monmouth, Raglan, and this junction.

One year later, in 1936, the A4042-A465 North-South route from Newport to Hereford was trunked, using the A40 north of this junction to link the two. The A40 route was trunked in 1946, as was the A465 west of Abergavenny town centre.

The junction became a roundabout in 1962, when the A465 Heads of the Valleys road (since dualled at this point) was diverted to it via a southern bypass of Abergavenny. Then, in the early 1970s, a new eastern bypass of the town was opened from here, taking the northbound A465 along a route on the eastern side of the railway line. With the A40 from Raglan having in the meantime been upgraded to follow a new alignment (the old route becoming the B4598), there were now six routes converging on Hardwick – five of them on trunk roads – necessitating a major expansion of the junction between them all. This was accomplished by constructing a large "balloon" extension of the eastern side of the original roundabout, incorporating a second underpass of the railway about 140 metres north of the first bridge, and the result was today's gyratory system.

Despite plans to grade-separate the rest of the Heads of the Valleys route, none exist as yet for any alteration to this junction, its eastern terminus.


Route To Notes


Abergavenny / Y Fenni, Brecon / Aberhonddu


Raglan / Rhaglan, Monmouth / Trefynwy, The Midlands (M4, M50) Hereford avoiding low bridge / i osgoi pont isel


Hereford Height restriction / Cyfyngiad uchder 4.4m / 14'3" in 12 miles / mewn 12 milltir


Merthyr Tydfil / Merthyr Tudful For B4246 Llanfoist / Llan-ffwyst Fawr, Blaenavon / Blaenafon


Pontypool / Pontypŵl, Cwmbrân, Newport / Casnewydd


Clytha, Usk / Brynbuga Light vehicles only / Cerbydau ysgafn yn unig
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Hardwick Gyratory
Related Pictures
View gallery (1)
Crossed lines - Geograph - 284556.jpg
Junctions on the A40
      Central London - Denham      Bank • St Paul's • Holborn Circus • St Giles Circus • Oxford Circus • Marble Arch • Lancaster Gate • Shepherds Bush Green • Holland Park Roundabout • Marylebone Flyover • Paddington • Westway Roundabout • Wood Lane • Savoy Circus • Gipsy Corner • Hanger Lane • Ealing Common • Perivale • Greenford Roundabout • Target Roundabout • Polish War Memorial • Hillingdon Circus • Swakeleys • Denham Roundabout
           Denham - Wheatley            Denham Roundabout • Pyebush Roundabout • London End Roundabout • Old Beaconsfield Roundabout • Holtspur Temporary Terminal • Holtspur Roundabout • Knaves Beech • Abbey Way Gyratory • Eden Roundabout • Pedestal Roundabout • Stokenchurch • Three Pigeons • Wheatley
  Wheatley - Cheltenham - Ross  Wheatley • Headington Roundabout • Cutteslow Roundabout • Wolvercote Roundabout • Eynsham Roundabout • Asthall Barrow Roundabout • Burford Roundabout • Cox's Meadow • Benhall Roundabout • Arle Court Roundabout • Golden Valley • Elmbridge Court • Over Roundabout • Highnam Corner • Highnam Roundabout • Forest Gate Junction • Weston Cross • Hildersley Roundabout • Over Ross Roundabout
    Ross - Brecon - Carmarthen    Over Ross Roundabout • Wilton Roundabout • Raglan Interchange • Raglan Roundabout • Hardwick Gyratory • Brynich • Tarell • Square and Compass • Llandeilo • Abergwili • Pensarn
       Carmarthen - Fishguard        Pensarn • Llanboidy Road • Blackbridge • Penblewin • Robeston Wathen • Canaston Bridge • Scotchwell • (Salutation Square) • (Bridgend Square) • (Prendergast Roundabout) • Withybush • Rafael • Windyhall
Junctions on the A465 and A4060
A465Aylestone Hill • Belmont • Skenfrith • Hardwick • Llanfoist • Glanbaiden • Gilwern • Saleyard • Brynmawr • Ebbw Vale East • Rassau Ind. Est. • Carmeltown • Ebbw Vale West • Tredegar • Rhymney • Dowlais Top • Pant • Cefn Coed • Hirwaun • Rhigos • Glynneath • Cwgwarach • Resolven • Aberdulais • Neath Abbey • Llandarcy
A4060Dowlais Top • Pentrebach • Abercanaid