Construction work resumes this morning on the controversial South Eastern Motorway at Carrickmines Castle.
The High Court yesterday dismissed a constitutional challenge to the roadbuilding taken by a Dublin conservationist.
Mr Dominic Dunne claimed part of the National Monuments Amendment Act, 2004, was unconstitutional and contrary to EU directives.
In her ruling, Miss Justice Mary Laffoy rejected Mr Dunne's objections, clearing the way for the work to continue.
Section 8 of the Act, which was introduced earlier this summer, allowed for the partial demolition and removal of the ruins of Carrickmines Castle to allow for the construction of the South Eastern Motorway - the final link in Dublin's M50 bypass.
Dún Laoghaire-Rathdown County Council was ordered to stop work on the controversial M50 route on August 19th to facilitate a full High Court hearing into the legality of the new heritage legislation.
The council claimed that delays in the motorway project, which was halted by court order on August 19th, had cost the taxpayer up to €357,000 per week.