&sq=&lang=&file=File:IRL_N4.svg) | |
|---|---|
| Bóthar N4 | |
| Route information | |
| Length | 198.21 km (123.16 mi) |
| Location | |
| Country | Ireland |
| Primary destinations | (bypassed routes in italics) |
| Highway system | |
&sq=&lang=&file=File:M4_motorway_IE.png) | |
|---|---|
| Mótarbhealach M4 | |
| Route information | |
| Length | 62 km (39 mi) |
| Existed | 1994–present |
| History | Completed 1994–2006 |
| Component highways | |
| Major junctions | |
| From | Lucan |
&sq=&lang=&file=File:Motorway_Exit_11_Ireland.PNG){kind=small}  | |
| To | Kinnegad |
| Location | |
| Country | Ireland |
| Primary destinations | Leixlip, Kilcock, Enfield |
| Highway system | |
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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.