The preferred route for the N2 Slane Bypass, County Meath, Ireland, announced in January 2010 by the National Roads Authority, runs 500 metres from the edge of the Bend of the Boyne UNESCO World Heritage Site. According to the World Heritage Committee: "The three main prehistoric sites of the Br� na B�inne Complex, Newgrange, Knowth and Dowth, are situated on the north bank of the River Boyne 50 km north of Dublin. This is Europe's largest and most important concentration of prehistoric megalithic art. The monuments there had social, economic, religious and funerary functions. The Committee inscribed the site under criteria (i), (iii) and (iv) and invited the Irish authorities to control carefully future developments in and around the site and to involve ICOMOS in conservation and management planning."