Roads - OSi National 250k Map of Ireland

All European roads (E-roads) and all roads connecting built-up areas, additionally, other roads can be included when it is needed to reach full connectivity of the transportation network (e.g. direct link between two built-up areas) or only way to reach a built-up area or isolated places (harbours, airports). Inside built-up areas only main roads (e.g. through roads) are portrayed. Roads are represented by one line regardless of the number of lanes or carriageways