Junctions
| Westbound exit | Junction | Eastbound exit |
| M50 motorway : Dublin Port, Bray and all other routes (M50) | M50 motorway : Dublin Port, Bray and ALL OTHER ROUTES (M50) | |
| Liffey Valley Interchange: Clondalkin, Liffey Valley Shopping Centre (R113) | Liffey Valley Interchange: Clondalkin, Liffey Valley Shopping Centre (R113) | |
| Ballydowd Interchange: Lucan, Baldonnel (R136), | Ballydowd Interchange: Lucan, Baldonnel (R136), | |
| Newcastle Road Interchange: Lucan, Newcastle (R120), | Newcastle Road Interchange: Lucan, Newcastle (R120), | |
| Dodsboro | Lucan, Dodsboro, R835 | |
| Leixlip Interchange: Leixlip (R148) Celbridge (R403) | Leixlip Interchange: Leixlip (R148) Celbridge (R403) | |
| Westbound exit | Junction | Eastbound exit |
| Leixlip West, Celbridge West R449 | Leixlip West, Celbridge West R449 | |
| Maynooth, Clane, Naas | Maynooth, Naas | |
| Kilcock, Clane R407 | Kilcock, Clane R407 | |
| Enfield, Edenderry R402 | Enfield, Edenderry R402 | |
| Enfield services | Enfield services | |
| Kinnegad R401 | Kinnegad R401 | |
| Galway, Athlone (M6 ) | No access | |
| Kinnegad | Kinnegad | |
| End of motorway | Start of motorway | |
| Road continues as N4 for Mullingar, Longford, (N5), Sligo | ||
Read more about this topic: N4 Road (Ireland)