Dublin Port Dublin Port Dublin Port () is the seaport of Dublin, Ireland, of both historical and contemporary economic importance. Approximatively two-thirds of Ireland's port traffic travels via the port, which is by far the busiest on the island of Ireland. Recently, the port and its land, mostly at the eastern end of Dublin's Northside, but also with a southern section, were valued at €25 billion – €30 billion. The modern Dublin Port is located either side of the River Liffey, out to its mouth. On the north side of the river, the main part () of the port lies at the
R666 road (Ireland) R666 road (Ireland) The R666 road is a regional road in Ireland which runs west-east from the R639 in Fermoy town centre to the bridge over the River Blackwater on the outskirts of Lismore. The road passes through Ballyduff, and beneath the River Blackwater viaduct which carries the M8 motorway. The R666 begins in Fermoy as the Rathhealy Road. From here to its merger with the R667 road 3km south of Kilworth, the R666 was once part of the historic road linking Dublin and Cork. It was mapped as such by Herman Moll in his 1714 "New Map of Ireland".