The main arteries for North Wales are A494, running from Queensferry (near the English border) to Dolgellau. The road begins from the M56 motorway, connecting North Wales with Chester and Manchester Airport, both in England. More importantly the A55, which runs from Holyhead (for ferry connections to Ireland), Conwy, Llandudno Junction and Rhyl to a junction with the M53 motorway near Chester.
One of the oldest roads the A5 runs from the port of Holyhead south east to Bangor then down through Snowdonia to Betws-y-Coed, Corwen, Llangollen and over the English border south of Chirk. This route has served as the main passage for London-Dublin traffic for many years although its usage has been superseded by the A55 coast road. It's now more famed as a scenic route and notorious for many Bank Holiday traffic jams.
Two routes serve as the main North to South links. The A483 begins near Swansea and takes a north-easterly route to Ammanford, Llandeilo, Llandovery, Llanwrtyd Wells, Builth Wells, Llandrindod Wells, Newtown, Welshpool and Wrexham, finally ending at Chester.
The A470 begins in Cardiff Bay and passes through Cardiff following a north-north western route on to Pontypridd, Abercynon, Merthyr Tydfil, Brecon, Builth Wells, Rhayader, Llangurig, Llanidloes, Llandinam, Commins Coch, Mallwyd, Trawsfynydd, Blaenau Ffestiniog, Dolwyddelan, Betws-y-Coed and terminates at Llandudno. It is a dual carriageway between Cardiff and Merthyr (where it meets the Heads of the Valleys Road, the A465), and the section of this route into Cardiff is heavily used.
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