A regional road (Irish: bóthar réigiúnach) in the Republic of Ireland is a class of road not forming a major route (such as a national primary road or national secondary road), but nevertheless forming a link in the national route network. There are over 11,600 kilometres (7,200 miles) of regional roads.[1] Regional roads are numbered with three-digit route numbers, prefixed by "R" (e.g. R105). The equivalent road category in Northern Ireland are B roads.
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: CS1 maint: archived copy as title (link) Roads Ireland, '€17 billion for roads', issue 4, 48.