The R318 road is a regional road in County Mayo in Ireland. It connects the N26 at Foxford to the R310 at Cuingbeg, away (<span class="plainlinks">map of the route</span>).
The government legislation that defines the R318, the Roads Act 1993 (Classification of Regional Roads) Order 2012 (Statutory Instrument 54 of 2012), provides the following official description: