The Department for Infrastructure has served a Notice of Appeal against the A5 judgement made in June.
Speaking as the appeal was lodged to the Court of Appeal, Infrastructure Minister Liz Kimmins said: “I am determined to see this project go ahead and therefore it is important that we appeal the decision made in the High Court on 23 June.
“Too many lives have been lost on the A5, and far too many have been injured. We owe it to those people and their families to use every opportunity available to us to improve road safety in this area.
In June, Belfast's High Court found in favour of landowners who had opposed the redevelopment of the A5 road through Tyrone and Derry. The judge said there was insufficient evidence that the project complied with Stormont's own legally binding climate change legislation.
In July, Infrastructure Minister Liz Kimmins flagged her intention to appeal but needed the support of her Executive colleagues. “The A5 Western Transport Corridor is a vital infrastructure project; my team and I have been working around the clock and will continue to do so. We are determined to build the A5.”