Conservationists campaigning against the M50 motorway in South Dublin will this morning seek a High Court injunction to halt work on the project.
Mr Vincent Salafia, spokesman for the Carrickminders group
Mr Vincent Salafia, spokesman for the Carrickminders group, said: "We will go in and apply for an interlocutory injunction to stop construction work because we believe it is illegal."
Work on the south eastern motorway route, which passes over the ruined walls of Carrickmines Castle, resumed yesterday after a two-year delay caused by sit-in protests and legal battles.
Dun Laoghaire Rathdown Co Council says it is acting within the law and that delays have already added €20 million to the final estimated cost of €596 million project.
The nine-kilometre final section of the M50 city bypass was to open this October, but is now expected to be completed by August 2005 - barring any interruptions.