I do not think this map is correct, in Moydamlaght Forest the metal road signs and then the yellow and blue waymarkers on the ground lead up through the forest, then the route goes over open country to the Glenshane forest and proceeds further towards Dungiven by a country lane and then the Corrick Road. Please see this map: http://www.walkni.com/ulsterway/d/maps/16/Moneyneany%20to%20Dungiven%20-%20all%20maps.pdf

The route is the same as the above linked map also in the old Ulster Way guide books I have going back to 1979. OSNI however show it following the road now, which I think is wrong.