While the Road Traffic Act 2004 sets default speed limits for various categories of roads, elected members of local authorities have statutory responsibility for deciding on and making appropriate Special Speed Limit bye-laws for local roads within their administrative area.
To assist local authorities in the application of Special Speed Limits, my Department's updated Guidelines for Setting and Managing Speed Limits in Ireland, which is available to all local authorities, reiterates the statutory responsibilities of elected members in relation to the making of such Special Speed Limit bye-laws, subject to following Department Guidelines.
Therefore, any decision as to whether to reduce the speed limit from the Lissivigeen roundabout to the Pike Hill, Killarney, Co. Kerry is a matter for Kerry County Council, subject to the consent of Transport Infrastructure Ireland as the road in question is a National Road.