National primary road

Naas Road (N7), non-Motorway high-grade dual carriageway.
Sign in Dublin indicating the principal national primary roads fanning out from the capital city.

A national primary road (Irish: Bóthar príomha náisiúnta) 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.