To ease some of the pressure on the junction, a dedicated slip road between the eastbound M4 and northbound A470 was successfully opened last year.
Er mwyn lleddfu rhywfaint o'r pwysau ar y gyffordd, agorwyd ffordd ymuno benodol rhwng yr M4 tua'r dwyrain a'r A470 tua'r gogledd llynedd.