N4 road (Ireland)
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The N4 road is a national primary road in Ireland, running from Dublin to the northwest of Ireland and Sligo town. The M6 to Galway diverges from this route after Kinnegad, while the N5 to Westport diverges at Longford town. Most sections of the N4 that are motorway-standard are designated the M4 motorway.
The 2+2 section of the N4.
Sign in Mullingar marking the opening of the bypass by Taoiseach (and TD for Longford–Westmeath) Albert Reynolds
Travelling East along the upgraded Lucan Bypass in west Dublin.
J11; M6/M4 junction (prior to redesignation of the N6 → M6).
National primary road
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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