From the M50, the N7 passes south of Clondalkin leaving the city as part of the "Naas Road". (The Naas Road begins at the Grand Canal as a regional road (R810), a continuation of the Tyrconnell Road. It continues 3.4 km southwest to the M50 motorway, at the Red Cow interchange, where it becomes the N7.) The N7 route continues in a south west direction with 3 lanes of traffic each way towards Naas for approximately . Construction of the third lane commenced on 4 January 2005 and concluded on 14 August 2006 (thumbnail left); having been originally dualled between 1963 and 1968.