As Minister for Transport I have responsibility for overall policy and securing exchequer funding in relation to the National Roads Programme. Under the Roads Acts 1993-2015 and in line with the National Development Plan (NDP), the planning, design and construction of individual national roads is a matter for Transport Infrastructure Ireland (TII), in conjunction with the local authorities concerned.
This is also subject to the Public Spending Code Guidelines and the necessary statutory approvals. The N20 road corridor options are currently being progressed by TII along with public transport (rail) alternatives. As this scheme is at an early stage of development and subject to appraisal and statutory approval, cost estimates cannot be definitive until after statutory approval and confirmation of timing and scheme scope. In this context, TII is best placed to advise you.
Noting the above position, I have referred your question to TII for a direct reply. Please advise my private office if you do not receive a reply within 10 working days.