 The A6 Dualling Dungiven to Derry scheme will see of dual carriageway constructed at an estimated cost of £320m.In addition, the A6 Dualling - Randalstown (M22) to Castledawson project will see of dual carriageway road constructed at an estimated cost of £100m.The remaining between Castledawson and Dungiven has not been allocated funds to develop the last stage of the dualling; it is widely hoped that by the time construction is underway on the Derry-Dungiven stretch, further funds will be made available and the two largest urban centres in Northern Ireland will finally have a high standard dual carriageway link, although this looks unlikely in the current economic climate.