N12 road (Ireland)
The N12 road is one of the shortest national primary roads in Ireland, running about 8 km (5.0 mi) from outside Monaghan (where it leaves the N2) to the border with County Armagh, Northern Ireland at Ardgonnell Bridge. The N12 is part of an overall route running from Monaghan to Belfast.
The route, entirely contained in County Monaghan, commences at the junction with the N2 on the outskirts of Monaghan town, in the townland of Coolshannagh. From here the route passes through the townlands of Tullyhirm and Cavanreagh, with the R185 leaving the route to the north. Just before the border, the N12 passes through Tyholland, and in the townland of Killyneill just after this and before the border, the R213 leaves the route to the south.
The overall Monaghan-Belfast route, of which the N12 is but a link, passes Armagh, Portadown, Lurgan and Lisburn as the A3 road, and A1 (from Lisburn to Belfast). Similar routes in the Republic of Ireland, which constitute part of a route that also passes through Northern Ireland, include the N2, N3 and routes N13–N16. The east-west route corridor of which the N12 is a part also includes the N54 to the west of Monaghan.
There are no immediate programmes to upgrade the N12, however, Monaghan County Council include a proposed realignment of the route in their development plan.