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A470

A470 shield

A470
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
  A4119A4119 road
A4160A4160 road
A48 A48 road
A469A469 road
[ M 4  ]M4 motorway
A4054A4054 road
A468A468 road
A4058A4058 road
A4223 A4223 road
A4059A4059 road
A472A472 road
A4060A4060 road
A4102A4102 road
A465A465 road
A4215A4215 road
A40 A40 road
A479 A479 road
A483A483 road
A4081A4081 road
A44 A44 road
A489A489 road
A458A458 road
A487A487 road
A494A494 road
A5 A5 road
A55 A55 road
A547A547 road
To: Llandudno
Location
Primary
destinations
:

Merthyr Tydfil
Brecon
Builth Wells
Rhayader
Llangurig
Dolgellau
Blaenau Ffestiniog
Betws-y-Coed
Road network

A470 shield

The A470, also known as the Cardiff to Glan Conwy Trunk Road, is the major long-distance road in Wales, from Cardiff on the south coast to Llandudno on the north coast. It is 186 miles (299 km) long, and has undergone considerable road improvement 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 road travels through two of Wales's national parks, the Brecon Beacons in the south and Snowdonia National Park, starting just south of Dinas Mawddwy in the north. It is a primary trunk route throughout its length, and the southernmost 26 miles (42 km), from Cardiff Bay to Merthyr Tydfil, is mainly direct and good quality dual carriageway, but most of the route from north of Merthyr to Llandudno is single carriageway which has seen considerable improvement in the last 20–30 years.

The southernmost point of the route is at The Flourish, Cardiff Bay, outside the Wales Millennium Centre. It runs up Lloyd George Avenue (this was previously Collingdon Road, and the A470 previously ran along the parallel Bute Street), and continues along St. Mary Street in central Cardiff. The road then becomes North Road, and after a tidal flow system running to Maindy and then goes over the flyover at the Gabalfa interchange of the A48 and the A469. It becomes an urban dual-carriageway along Manor Way, with a 40 mph (64 km/h) speed limit and with many traffic-signalled crossings. It passes without interruption under the M4 at the giant Coryton roundabout. For the next 15 miles (24 km) it is a modern high-speed dual carriageway by-passing Tongwynlais and Castell Coch, Taff's Well, to Pontypridd. Heading north to Abercynon, the road now follows the route of the Taff Vale Railways Llancaiach Branch to Quakers Yard roundabout, where it is joined by the A4059 from Abercynon, Aberdare and Hirwaun ; the A472 from Ystrad Mynach and Pontypool finally the A4054 from Quakers Yard, and Merthyr Tydfil.


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Wikipedia

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