Since the western link roads was built , a number of major developments have been built , such as the Cardiff Bay Retail Park , IKEA , Celtic Gateway , Cardiff International Sports Village that include the Cardiff International Pool , Cardiff International White Water and Cardiff Arena , which have all generated additional traffic at the Ferry Road Interchange . In addition , the Leckwith development , which include Cardiff City Stadium , Cardiff International Sports Stadium and the Capital Retail Park with a new Asda supermarket , have also significantly increased traffic on the Leckwith Interchange . At the Culverhouse Cross Interchange , older developments such as the Brooklands Retail Park , Wenvoe Retail Park and Valegate Retail Park , including Tesco and Marks & Spencer have also significantly increased congestion along with commuter traffic from the Vale of Glamorgan . From 1989 to 1997 there had been an increase in traffic of 78 % and a further increase of 35 % by 2016 is predicted by the Assembly . The Vale of Glamorgan Council also expressed reservations about the new developments of the Cardiff International Sports Village and the Cardiff City Stadium , which include the Capital Retail Park . On 18 October , 2006 , the council requested that the WAG assess the existing traffic conditions and future growth in traffic on the network .