The M18 is a motorway-standard upgrade of the N18 between Limerick and Galway. Currently, motorway restrictions start at Junction 9 with the N19 to Shannon, and continue until the road becomes the M17 at the Rathmorrisy Interchange.
Gort-Crusheen (Junctions 14-16) opened at 15:00 on 12th November 2010
Gort-Rathmorrisy (Junctions 16-18) opened on 27th September 2017. Construction began on 9 May 2014
Irish Statute Book
Roads Act 2007 (Declaration of Motorways) Order 2009 - This instrument converts the following sections of the N18 to motorway:Shannon to Ennis (known as Ballycasey to Dromoland), Ennis Bypass (also known as N18 Dromoland to Crusheen), Gort to Crusheen, Oranmore to Gort