The A55, also known as the North Wales Expressway (Welsh: Gwibffordd Gogledd Cymru) and the Chester to Bangor Trunk Road, is a major road in Britain. Its entire length is a dual carriageway primary route, with the exception of the point where it crosses the Britannia Bridge over the Menai Strait. All junctions are grade separated except for two roundabouts — one east of Penmaenmawr and one in Llanfairfechan.