Errigal is a 751-metre mountain near Gweedore in County Donegal, Ireland. It is the tallest peak of the Derryveagh Mountains and the tallest peak in County Donegal. Errigal is also the most southern and the highest of the mountain chain called the "Seven Sisters" by locals. Wikipedia
the workers built a new fence and had it placed further back from the road so they could put in a gravelled area. There are usually some signs placed on the fence and now it will be safer to do that.