A national secondary road is a category of road in Ireland. These roads form an important part of the national route network but are secondary to the main arterial routes which are classified as national primary roads. National secondary roads are designated with route numbers higher than those used for primary roads, but with the same "N" prefix. Routes N51 and higher are all national secondary roads.
The N59 on the shore of Kylemore Lough in County Galway
N69, Tralee Bypass, County Kerry
N62, County Tipperary
N72, near Mallow, County Cork
A national primary road is a road classification in Ireland. National primary roads form the major routes between the major urban centres. There are 2649 km of national primary roads. This category of road has the prefix "N" followed by one or two digits. Motorways are prefixed "M" followed by one or two digits.
Naas Road (N7), non-Motorway high-grade dual carriageway.
Sign in Dublin indicating the principal national primary roads fanning out from the capital city.
2+2 section of the N4 (Dromod-Roosky bypass) in County Leitrim.
N11 Exit sign. This route has since been upgraded to motorway status