The N84 road is a national secondary road in Ireland. It is a major route in the West connecting Galway city with Castlebar. The route is of poor quality with a few short good sections in County Mayo between Ballintubber and Ballinrobe. Ballinrobe has become a bottleneck on the route in recent years with up to 8,000 vehicles passing through the town's one-way streets. A bypass for the town is in the planning.