A470 road

The A470 in Wales is also referred to as the Cardiff to Glan Conwy Trunk Road. It is a 186-mile route that links Cardiff on the south coast to Llandudno on the north coast. There have been considerable road improvements in the last two decades. While previously one had to navigate the narrow roads of Llanidloes and Dolgellau, both these market towns are now bypassed due to extensive road modernisation. The 26 miles from Cardiff Bay to Merthyr Tydfil are mainly direct and good quality dual carriageway, but most of the route from north of Merthyr to Llandudno is single carriageway that has seen improvement in the last 20 to 30 years.

The road travels through two of Wales's national parks; the Brecon Beacons, and Snowdonia National Park starting just south of Dinas Mawddwy.

Wikipedia