Transport in Cardiff, capital and most populous city in Wales involves road, rail, bus, water and air. Several factors have influenced the development of its transport network. It is a major city of the United Kingdom and a centre of employment, government, retail, business, culture, media, sport and higher education.
Welsh Government statistics for 2008/09 showed that Cardiff had the lowest percentage of the population who travelled to work by car, van or minibus, suggesting the highest public transport usage to work out of all 22 local authorities in Wales.
Between 2008 and 2009, car and taxi usage dropped from 59.7% to 52.3%, while walking was up by 1.4% to 18.3%. For bus usage, the figure had risen by 3% to 15.5% and cycling use increased from 1.6% to 7.4%. Train usage also rose from 3.8% to 4.7% over the same period.
The M4 motorway connects Cardiff to towns and other cities in Britain. To the east: Newport, Bristol, Bath, Swindon, Reading and terminating at London. To the west: Bridgend, Swansea, Llanelli and terminating near Carmarthen. It is part of the unsigned European route E30. Cardiff can be accessed directly from junctions 29 – 34 inclusive:
The A48(M) motorway connects Junction 29 to the city centre with exits for the Cardiff suburbs of St. Mellons (westbound only), where it becomes the A48, Pontprennau (M4 junction 30 via the A4232), Pentwyn, Rumney, Llanederyn and also for the University Hospital of Wales.
The A4232 (also known as the Peripheral Distributor Road) connects M4 junction 33 with junction 30 by bypassing through the south of the city. From junction 33, exits are at Culverhouse Cross Interchange, Leckwith Interchange, Ferry Road Interchange (for Barry and Penarth) and Butetown, the road ends at Queen's Gate Roundabout, where the long-awaited Eastern Bay Link Road will eventually link with the Southern Way Link Road. It then goes onto the M4 at junction 30 via the A48 (Eastern Avenue) and the Pentwyn Link Road (A4232).