Given how rapidly Ireland's road network has changed in recent years, the 2009 Collins Comprehensive Road Atlas of Ireland is incredibly up-to-date. It correctly shows all sections of motorway that opened as late as December 2008, and it furthermore shows almost all sections presently under construction - the only exception being a 22km stretch of the N18 being built between Crusheen and Gort (though this will not open until 2010).
As things stand, this road atlas is undoubtedly the best around.
It is compact and clearly laid out using attractive colouring. Importantly, the spiral binding is sturdy. There is an extremely useful "Places of Interest" section showing many of the major spots worth visiting. The road atlas itself is of the usual high Collins standard - extremely user-friendly and clear. An excellent addition is the section on cities at the back of the atlas. Belfast, Cork, Dublin and Limerick all have a comprehensive street map, as well as detailed information on all attractions therein.
Simply put, this is the best road atlas of Ireland in 2009, and is an essential aid for anyone planning a road trip there this year. The one thing to remember is that because of the major road-building programme currently underway in Ireland, the atlas will be out of date by 2010, and even moreso by 2011.*
* Additional sections of the M3, M6, M7, M8, M9 and N25 will open from mid-2009 onwards. Substantial sections of existing dual carriageway on the Ns 2, 3, 4, 6, 7, 8, 11, 18, 20 and 21 will also probably be designated motorway before the end of this year.