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|---|---|
| Bóthar R639 | |
| Location | |
| Country | Ireland |
| Highway system | |
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The R639 road is one of Ireland's regional roads. Once designated the N8 national primary road (and before that some fractions were designated as the T6 and others as the T9), it was reclassified in stages as the R639 following the progressive opening of sections of the M8 motorway, which rendered the single carriageway N8 redundant as a national primary road. By-passed sections of the old N8 were generally reclassified as R639 as soon as a new section of M8 opened, thereby increasing the length of the R639. With the completion of the M8 on 28 May 2010, the R639 now stretches from Durrow, County Laois to Cork, running through counties Laois, Kilkenny, Tipperary, Limerick and Cork.