N4 road (Ireland)

N4 road shield}}
N4 road
Bóthar N4
Route information
Length198.21 km (123.16 mi)
Location
CountryIreland
Primary
destinations
(bypassed routes in italics)
Highway system
M4 motorway shield}}
M4 motorway
Mótarbhealach M4
Route information
Length62 km (39 mi)
Existed1994–present
HistoryCompleted 1994–2006
Component
highways
Major junctions
FromLucan
Major intersections
ToKinnegad
Location
CountryIreland
Primary
destinations
Leixlip, Kilcock, Enfield
Highway system
The 2+2 section of the N4.

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.