Metrolink: Dublin airport rail link cost more than doubles bbc.comCost of MetroLink project could rise as high as €17.5bn RTE.ieTunnelling and station construction works for Dublin metro to begin in 2028 Irish IndependentGovernment approves MetroLink to proceed to detailed tender stage National Transport AuthorityMetroLink: Market bids can begin for construction as project is ‘definitely happening’ The Irish Times