There's stop-start traffic because of a police incident on the A470 Southbound at A4054 Cardiff Road / Gwaelod-Y-Garth Road (Upper Boat Interchange).
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Gareth Bale urged Wales to continue "riding the wave" after clinching their spot in the last eight of Euro 2016.
Wales have qualified for the Euro 2016 quarter finals after beating Northern Ireland 1-0 in Paris.
A rally has been held in Cardiff following the EU referendum to show support to migrant communities.