A470 road

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A470
The A470 dual carriageway at Pontypridd.
Route information
Maintained by North and Mid Wales Trunk Road Agency and South Wales Trunk Road Agency
Length	186 mi (299 km)
Major junctions
From	Cardiff
Major intersections	A4119 A4160 A48 A469 M4 A4054 A468 A4058 A4223 A4059 A472 A4060 A4102 A465 A4215 A40 A479 A483 A4081 A44 A489 A458 A487 A494 A5 A55 A547
To	Llandudno
Location
Country	United Kingdom
Primary destinations	Pontypridd Merthyr Tydfil Brecon Builth Wells Rhayader Llangurig Dolgellau Blaenau Ffestiniog Betws-y-Coed
Road network
Roads in the United Kingdom Motorways A and B road zones
← A469 → A472

The A470 (also named the Cardiff to Glan Conwy Trunk Road)^[1] is a trunk road in Wales. It is the country's longest road at 186 miles (299 km) and links the capital Cardiff on the south coast to Llandudno on the north coast.^[2] 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^[when?]. The 26 miles (42 km) from Cardiff Bay to Merthyr Tydfil are mainly dual carriageway, but most of the route from north of Merthyr to Llandudno is single carriageway.