Gabalfa is a district and community in the north of the city of Cardiff, capital of Wales. It is characterised by a four-lane flyover road at the Gabalfa Interchange, where the A48 road meets the A470 road which leads from Cardiff to northern Wales, and the A469 road.

The A470 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. 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 (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.