Welsh Government (Junctions)
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This is a list of Welsh trunk road junctions.
| Name | Location | Roads | Type |
|---|---|---|---|
| Abercanaid Roundabout | Abercanaid | A470, A4060 | Roundabout |
| Aberdulais Interchange | Aberdulais | A465, A4109, A4230, B4434 | |
| Abergwili Roundabout | Abergwili | A40 | Roundabout |
| Abergwyngregyn Interchange | Abergwyngregyn | A55 | LILO |
| Abernant Interchange | Abernant | A449, R110, R114 | Modified Diamond |
| Ael y Bowl Interchange | Llanfair Pwllgwyngyll | A55, A5025 | Diamond |
| Alltami Junction | Ewloe Green | A55, A494 | Fork |
| Bala Junction | Dolgellau | A470, A494 | T-junction |
| Blackbridge Roundabout | Whitland | A40 | Roundabout |
| Bodelwyddan Interchange | Bodelwyddan | A55 | LILO |
| Bontnewydd roundabout | Bontnewydd | A487 | Roundabout |
| Bridge Street Interchange | Ynysangharad | A470, A4223 | Modified Roundabout Interchange |
| Broadway Interchange | Ynysanharai | A470, A4058 | Modified Roundabout Interchange |
| Brookside Interchange | Northop | A55, B5125, B5126 | Offslip + LILO |
| Brynmawr Junction | Pontygof | A465, A467, A4047 | Roundabout (GSJ under construction) |
| Caerleon Interchange | St Julians, Newport | M4, A4042, B4596 | Modified Roundabout Interchange |
| Caernarfon Road Interchange | Goetre | A55, A4087 | Diamond |
| Canaston Bridge Roundabout | Canaston Bridge | A40, A4075, B4314 | Roundabout |
| Cardiff West Interchange | Capel Llanilltern | M4, A4232 | Roundabout Interchange |
| Carmeltown Roundabout | Rassau | A465, A4281 | Roundabout |
| Carreg Bran Interchange | Llanfair Pwllgwyngyll | A5, A55 | Half diamond |
| Castleton Interchange | Castleton | M4, A48(M) | Fork |
| Cefn Coed Roundabout | Cefn Coed | A465, A470 | Roundabout |
| Cefn Du Interchange | Gaerwen | A55, A5152 | Diamond |
| Cemmaes Road Roundabout | Glantwymyn | A470, A489 | mini roundabout |
| Cibyn roundabout | Cibyn | A487, A4086 | Roundabout |
| Coldra Interchange | Coldra, Newport (NE) | M4, A48, A449, B4237 | Grade-separated hamburger |
| Colwyn Bay Interchange | Colwyn Bay | A55, B5113 | Diamond |
| Conway Road Interchange | Colwyn Bay | A55, A547, B5113, B5115 | Modified Diamond |
| Coopers Corner (Aberystwyth) | Aberystwyth | A44, A487 | T-junction |
| Coryton Interchange | Tongwynlais | M4, A470, A4054 | 3-level stacked roundabout |
| Cross Foxes | Cross Foxes, Dolgellau (E) | A470, A487 | T-junction |
| Cross Hands Roundabout | Llanelli | A48, A476 | Roundabout |
| Crossgates roundabout | Crossgates | A44, A483 | Roundabout |
| Cwmgwarach Roundabout | Blaengwrach | A465, B4242 | Roundabout |
| Dalar Hir Interchange | Caergeiliog | A5, A55 | Dumbbell |
| Dobshill Interchange | Dobshill | A55, A550 | Roundabout interchange |
| Dolphin Junction | Pentre Halkyn | A55, A5026, B5123 | Offslips |
| Dowlais Top Roundabout | Dowlais Top | A465, A4060 | Roundabout |
| Druid Junction | Druid | A5, A494 | |
| Dwygyfylchi Junction | A55 | T-junction | |
| Eagles junction | Caernarfon | A487, A4085 | One-way system |
| Earlswood Interchange | Earls Wood | M4, A48, A483 | Modified trumpet |
| Ebbw Vale East Junction | Waun Rydd | A465, A4281 | Fork |
| Ebbw Vale West Junction | Bryn-Serth | A465, A4046 | Fork & Roundabouts |
| Ewloe Interchange | Ewloe | A55, A494 | Trumpet |
| Faenol Interchange | Abergele | A55, A547 | Roundabout Interchange |
| Gellideg roundabout | Gellideg | A470, A4102 | Roundabout |
| Gilwern Junction | Gilwern | A465, A4077, R206 | LILO (Eastbound only) |
| Glan Conwy Interchange | Glanconwy | A55, A470, A547, B5381 | Roundabout Interchange + Roundabout |
| Glan Menai Junction | Llanfair Pwllgwyngyll | A5, A55 | Offslip |
| Glanbaiden Roundabout | Gilwern (E) | A465, A4077, B4246 | Roundabout |
| Glynneath Interchange | Glynneath | A465, A4109 | Trumpet |
| Glyntaff Interchange | Glyntaff | A470, A4054, B4595 | Modified Roundabout Interchange |
| Goat roundabout | Pitian Patian | A487, A499 | Roundabout |
| Gresford Interchange | Little Acton | A483, A5152, A5156, B5445 | Roundabout interchange |
| Groes Interchange | Margam (SE) | M4, A48 | On-slip |
| Grove Park Interchange | St Julians, Newport | M4, A4042 | Fork |
| Gwernymynydd Roundabout | Gwernymynydd (E) | A494, A5119 | Roundabout |
| Hardwick Gyratory | Abergavenny (SSE) | A40, A465, A4042, B4598 | Gyratory |
| Hendy Interchange | Hendy | M4, A4138 | Diamond |
| High Cross Interchange | High Cross, Newport | M4, B4591 | Parclo/Roundabout Hybrid |
| Hirwaun Roundabout | Hirwaun | A465, A4059 | Roundabout |
| Johnstown Interchange | Edisbury Grange | A483, B5406 | Diamond |
| Kingsland Roundabout | Kingsland | A55, B4545 | Roundabout |
| Llanboidy Road Roundabout | Whitland (E) | A40, B4328 | Roundabout |
| Llandarcy Interchange | Pen-yr-heol | M4, A465, B4290 | Roundabout interchange |
| Llandeilo Roundabout | Llandeilo | A40, A483 | Roundabout |
| Llandudno Junction Interchange | Llandudno Junction | A55, A546 | Roundabout Interchange |
| Llanddulas Interchange | Llanddulas | A55, A547 | Parclo |
| Llanfairfechan Roundabout | Penmaen Park | A55 | Roundabout |
| Llanfoist Junction | Llanfoist | A465, A4143, B4246 | Modified dumbbell |
| Llangurig roundabout | Llangurig | A44, A470 | Roundabout |
| Llangyfelach Interchange | Llangyfelach | M4, A48, B4489 | Dumbbell |
| Llanidloes roundabout | Llanidloes | A470, B4518 | Roundabout |
| Llys y Gwynt Interchange | Coed Hywel | A5, A55 | Roundabout Interchange |
| Llyswen junction | Llyswen | A470, A479 | T-junction |
| Lon-Las Interchange | Lon-las | M4, A48, A4230, B4291 | Modified Roundabout Interchange |
| Lovesgrove Roundabout | Capel Bangor (W) | A44, A4159 | Roundabout |
| Madryn Interchange | Gorddinog | A55 | LILO |
| Magor Interchange | Magor | M4, A4810 | Roundabout Interchange + Modified Parclo |
| Mallwyd | Mallwyd | A458, A470 | roundabout |
| Malpas Interchange | Brynglas, Newport | M4, A4051 | Roundabout Interchange |
| Margam Interchange | Margam | M4, A48 | |
| Meiford roundabout | Meiford | A487 | Roundabout |
| Minffordd roundabout | Minfford | A487, A497 | Roundabout |
| Miskin Interchange | Miskin | M4, A4119 | Roundabout Interchange |
| Moat Lane Junction | Caersws | A470, A489 | Staggered Crossroads bisected by level crossing |
| Nant Turnpike Interchange | Llangefni (SW) | A5, A55, A5114 | Dumbbell |
| Nantgarw Interchange | Nantgarw | A468, A470, A4054 | Roundabout Interchange |
| Neath Abbey Interchange | Neath | A465, A474 | Roundabout Interchange |
| New Brighton Roundabout | New Brighton | A494, A5119 | Roundabout |
| Newhouse | Chepstow | M48, A466, R145 | Roundabout |
| Northop Interchange | Northrop | A55, A5119 | Dumbbell |
| Old Colwyn Interchange | Old Colwyn | A55 | Diamond |
| Pant Interchange | Galon Uchaf | A465 | |
| Pant-y-Dulath Interchange | Glan Llyn | A55 | LILO |
| Pencoed Interchange | Pencoed | M4, A473 | Roundabout Interchange |
| Penllergaer Interchange | Penllegaer | M4, A48, A483 | Roundabout Interchange |
| Penmaenmawr Junction | Penmaen | A55 | Offslip + Onslip |
| Pensarn Interchange | Pensarn, Abergele | A55, A548 | |
| Pensarn Roundabout | Pensarn, Carmarthen | A40, A48, A484 | Roundabout |
| Pentrebach Roundabout | Pentre-bach | A4054, A4060 | Roundabout |
| Pentwyn Interchange | Ingleside | M4, A4232 | Roundabout Interchange |
| Pentyla Interchange | Baglan | M4, A48, A4241, B4286 | Half Diamond + Fork with spur to roundabout |
| Plas Menai roundabout | Griffiths Crossing | A487 | Roundabout |
| Plough Lane Interchange | Aston | A494 | LILO |
| Pont Abraham Interchange | Pont Abraham | M4, A48, A483 | Roundabout |
| Pont Dafydd Junction | St Asaph (NE) | A55, A525 | LILO |
| Pont Seiont roundabout | Caernarfon | A4871 | Roundabout |
| Porthmadog roundabout | Bodawen | A487, A4971 | Roundabout |
| Puffin Roundabout | Dwygyfylchi | A55 | Roundabout |
| Pyle Interchange | North Cornelly | M4, A4229 | Roundabout Interchange |
| Queensferry Interchange | Queensferry | A494, A550, B5129 | Roundabout Interchange |
| Rassau Industrial Estate Junction | Rassau Industrial Estate | A465 | Half Diamond |
| Resolven Roundabout | Resolven | A465, B4434 | Roundabout |
| Rhigos Roundabout | Hirwaun | A465, A4059, A4061 | Roundabout |
| Rhyd-y-car roundabout | Rhyd-y-car | A470, A4102 | Roundabout |
| Rhymney Interchange | Llechryd | A465, A469, B4257 | Dumbbell |
| Robeston Wathen Roundabout | A40, B4314 | Roundabout | |
| Rogiet Interchange | Llanfihangel near Rogiet | M4, M48 | Fork |
| Rossett Interchange | Burton | A483, B5102 | Dumbbell |
| Ruthin Road Interchange | Wrexham | A483, A525 | Diamond |
| Saleyard Junction | Saleyard | A465, R204, R207 | Grade Separated (Modified T-junctions) |
| Sarn Bryn Caled Roundabout | Sarn-y-bryn-caled | A458, A483, A490 | Roundabout |
| Sarn Interchange | Sarn | M4, A4061, A4063 | Modified dumbbell |
| Skenfrith Junction | Maindiff | A465, B4521 | Echline Junction |
| Southgate Roundabout (Aberystwyth) | Southgate | A487, A4120 | Roundabout |
| Square and Compass | Ashfield | A40, A4069 | Roundabout |
| St Davids Park Interchange | Ewloe Green | A494, B5125, B5127 | Roundabout Interchange |
| St Davids roundabout | Caernarfon | A4871, B4419 | Roundabout |
| St Georges Interchange (Denbighshire) | Plas Cinmel | A55 | Offslip |
| St Mellons Junction | St Mellons | A48(M), A48, B4487 | Fork + Roundabout |
| Taffs Well Interchange | Tongwynlais | A470, A4054, B4262 | Modified Roundabout Interchange |
| Taibach Interchange | Taibach | M4, A4107 | Roundabout Interchange |
| Tal y Bont Interchange | Tan-y-lon | A55 | |
| Talardy Junction | St Asaph | A55, A525 | Roundabout Interchange |
| Tarell roundabout | Tarell | A40, A470, B4601 | Roundabout |
| The Old Station roundabout | Welshpool Station | A483, B4381 | Roundabout |
| Travellers Inn Junction | Cae Rhys | A55 | T-junction |
| Treban Interchange | Engedi | A55, A4080 | Dumbbell |
| Treborth Interchange | Treborth | A55, A487 | Folded dumbbell |
| Tredegar Junction | Tredegar | A465, A4048 | Roundabout Interchange |
| Tredegar Park Interchange | Tredegar Park, Newport | M4, A48, A467 | Modified Roundabout Interchange |
| Tremadog roundabout | Tremadog | A487, A498 | Roundabout |
| Ty Mawr Interchange | Kingsland | A55, A5153 | Dumbbell |
| Upper Boat Interchange | Treforest | A470, A473, A4054 | Roundabout Interchange |
| Usk Interchange | Llangeview | A449, A472, B4235 | Trumpet |
| Waen Interchange | nr Rhuallt | A55, B5429 | LILO |
| Warren Interchange | Broughton | A55, A5104 | Dumbbell |
| Wylfa Roundabout | Pentre | A494, A541, A549 | Roundabout |
| Y Felinheli roundabout | A487, A4087, B4547 | Roundabout | |
| Ynysforgan Interchange | Ynysforgan | M4, A4067, B4603 | Roundabout Interchange |
| Mold Road Interchange | Plas Coch | A483, A541 | Roundabout interchange |
| Croesfoel Interchange | Rhostyllen | A483, A5152, B5605 | Roundabout interchange |
| Billy Jean's | Pentre Halkyn | A55, B5123 | 3/4 Diamond |
| Brynich roundabout | Brecon | A40, A470, B4601 | Roundabout |
| Halton Roundabout | Halton | A5, A483 | Roundabout |
| Llanbadarn Fawr | East of Aberystwyth | A44, A4120 | Offset Crossroads |
| Culverhouse Cross roundabout | Culverhouse Cross | A48, A4050, A4232 | Roundabout interchange |
| Abercynon Roundabout | Abercynon | A40, A472, A4059 | Roundabout |
| Whitehurst Roundabout | Chirk | A5, B5070 | Roundabout |
| Penblewin roundabout | North of Narberth | A40, A478 | Roundabout |
| Edlogan Way Roundabout | Croesyceiliog | A4042 | Roundabout |
| Cwmbrân Roundabout | Pont-y-felin | A4042, A4051 | Roundabout |
| Pontypool Roundabout | Pontypool (SE) | A472, A4042 | Roundabout |
| Court Farm Roundabout | A4042 | Roundabout | |
| Rafael roundabout | South of Fishguard | A40, A487 | Roundabout |
| Scotchwell roundabout | Haverfordwest (E) | A40 | Roundabout |
| Windyhall roundabout | Goodwick | A40, A487 | Roundabout |
| Withybush roundabout | Withybush, Haverfordwest (N) | A40 | Roundabout |
| St Asaph Business Park Junction | St Asaph Business Park | A55 | Dumbbell |
| Conwy Morfa Interchange | Conwy | A55, A547 | Diamond |
| Gabalfa Interchange | Cardiff | A48, A469, A470 | Three-Level Stacked Roundabout |
| Broughton Junction | Broughton | A55 | Fork |
| Ruabon Interchange | Ruabon | A483, A539 | Dumbbell |
| Broughton Roundabout (Flintshire) | Broughton | A5104, B5125 | Roundabout |
| Travellers Rest (Carmarthen) | Johnstown, Carmarthen | A40 | |
| Pont Lesneven roundabout | Carmarthen | A40, A4242 | Roundabout |
| Raglan Interchange | Raglan (E) | A40, A449 | Trumpet |
| Drome Corner | Drome Corner | A494, A548, B5441 | Dumbbell |
| Deeside Industrial Park Interchange | Deeside Industrial Park | A494, A548, A550, B5441 | Roundabout interchange + Forks |
| Raglan Roundabout | Raglan | A40 | Roundabout |
| Highbeech Roundabout | Chepstow | A48, A466 | Roundabout |
| Caerwys Interchange | Lloc (SW) | A55, A5026, A5151, B5122 | Dumbbell |
| Pen Caledog Interchange | Valley (E) | A5, A55 | Dumbbell |
| St Clears Roundabout | St. Clears | A40, A477, A4066 | Roundabout |
| Raven Roundabout | Welshpool | A458, A490 | Roundabout |
| Dixton Roundabout | Dixton | A40, A466 | Roundabout |
| Meadows Bridge Interchange | Cross Hands | A48 | Dumbbell |
| Ferry Road Interchange | Cardiff | A4232, A4055 | Roundabout interchange |
| Queens Gate junction | Cardiff | A4232, A4234 | Roundabout interchange |
| Ocean Way Roundabout | Cardiff | A4232 | Roundabout interchange |