High Quality Content by WIKIPEDIA articles! The N7 road is a national primary road in Ireland, connecting Limerick and Dublin. The majority of the route (between Naas and Limerick) is motorway standard and is designated as the M7 motorway. At the Rosbrien interchange in Limerick the route continues as the N18 dual carriage to Shannon and Ennis. The road passes through the midlands of Ireland, and acts as a trunk route out of Dublin for the N8 and N9 national primary routes to Cork and Waterford respectively. It forms part of European route E20.