N1 (Republic of Ireland)
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The N1 is the Dublin-Belfast route. All but a short section between Dundalk and the border has been redesignated as M1. Former sections are mostly designated R132. A short section of former N1 in Dublin is designated N50 but remains signed as N1.
The route is part of E01, and is High-quality dual carraigeway throughout.
Junctions
 | This section contains a table that is missing kilometre posts for one or more junctions. |
As of 2011 all junctions feature their number on road signs.
| County | km | mi | Junction | Destinations | Notes | |
|---|---|---|---|---|---|---|
| County Louth | 18 | Dundalk (North), Carlingford (R173) | Greenore, Ravensdale (R132). | Continues as M1. | ||
| 19 |  R 174 – Ravensdale
|
Northbound entrance and southbound exit only. | ||||
| 20 | Carrickcarnan, Jonesborough (B113) | Northbound exit and southbound entrance only. Exit sliproad crosses border.
Continues as A1 into Northern Ireland. | ||||
1.000 mi = 1.609 km; 1.000 km = 0.621 mi
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