The A487 is a major road in Wales, running up the west coast. It starts in Haverfordwest, from where it travels north west to St David's, then switches back north east through Fishguard, Cardigan, Aberaeron, Aberystwyth, Machynlleth and Dolgellau. It then merges with the A470 road, reemerging just north of Trawsfynydd. The road continues via Portmeirion, Porthmadog and Caernarfon before terminating at the foot of the Menai Suspension Bridge near Bangor.