The High Court has rejected an application for an injunction which would effectively have stopped work on the M3 motorway.
The injunction would have possibly led to its re-routing from the Tara/Skryne Valley in Co Meath.
In his reserved judgement today, Mr Justice Thomas Smith rejected the application by campaigner Mr Vincent Salavia on all grounds.
The judge ruled that Mr Salavia had delayed in taking his legal action and that he did not have the legal standing to take the action in the first place.
The judge also ruled that the Minister for the Environment, Dick Roche, did not err in granting licences to allow archaeological works to proceed on 36 sites in the valley.
