 Also, L-Drivers (Learner Drivers), who are not permitted to drive on motorways can do so on high-quality dual carriageways, as on the rest of the national road network.HQDCs are a road type, not a classification, and the normal rules and regulations applying to all-purpose roads apply on HQDCs.Lay-bys (rest stops) are permitted on HQDCs and the N6/M6 Kinnegad - Kilbeggan scheme originally featured lay-bys, which would not be legal at present on roads with full motorway status, prior to its redesignation as a motorway.