The 207-km (129-mile) Dublin–Galway City trip is on a motorway (four-lane expressway) and takes about two hours, 20 minutes. The 196-km (122-mile) drive from Cork to Galway City (opt for the toll tunnel under Limerick) takes about three hours, and another 45 minutes to Oughterard, where the Connemara scenery begins. From Killarney, the shortest route to cover the 193 km (120 miles) to Galway (three hours) is to take N22 to Tralee, then N69 through Listowel to Tarbert and ferry across the Shannon Estuary to Killimer . From here, join N68 in Kilrush, and then pick up the M18.
Connemara and Mayo have good, wide main roads (National Primary Routes) and better-than-average local roads (National Secondary Routes), both known as N routes. If you stray off the beaten track on the smaller Regional (R) or Local (L) routes, you may encounter some hazardous mountain roads. Narrow, steep, and twisty, they are also frequented by untended sheep, cows, and ponies grazing "the long acre" (as the strip of grass beside the road is called) or straying in search of greener pastures. If you find a sheep in your path, just sound the horn, and it should scramble away. A good maxim for these roads is: "You never know what's around the next corner." Bear this in mind, and adjust your speed accordingly. Hikers and cyclists constitute an additional hazard on narrow roads. Within the Connemara Irish-speaking area, signs are in Irish only. The main signs to recognize are Gaillimh (Galway), Ros an Mhíl (Rossaveal), An Teach Dóite (Maam Cross), and Sraith Salach (Recess).