N53 road (Ireland)

The N53 road is a national secondary road in Ireland, running from junction 17 of the M1 just outside Dundalk, County Louth to the N2 bypass of Castleblayney, County Monaghan.
Route.
The official definition of the N53 is:
"Between its junction with N1 at Newtownbalregan in the county of Louth and the boundary between the county of Louth and the county of Armagh at Rassan via Hackball’s Cross all in the county of Louth
and
between the boundary between the county of Armagh and the county of Monaghan at Ballynacarry Bridge and its junction with N2 at Tullyvin via Annadrumman and Connaburry all in the county of Monaghan." 
A short section of the route passes through Cullaville, County Armagh, where it is classified as the A37.