 Commuter rail in Dublin operates on five lines.All commuter rail is operated by Iarnród Éireann's diesel multiple units.The Northern Commuter service extends from Dublin City Centre to Dundalk, the South Western Commuter service extends west from Heuston Station to stations as far as Kildare and Portlaoise, Western Commuter service extends from Dublin City as far as Maynooth and Longford and the South Eastern Commuter service runs from Gorey to Dublin city.