R123 road (Ireland)
- R123: Maynetown - Balgriffin, County Dublin
- Between its junction with R106 at Maynetown and its junction with R107 at Balgriffin via Snugborough and Balgriffin Park all in the county of Fingal.
- Statutory Instrument 188 of 2006 — Roads Act 1993 (Classification of Regional Roads) Order 2006, Irish Statute Book (irishstatutebook.ie). Retrieved 2010-08-02.