The HGV Road User Levy introduced on 1 April 2014 in the United Kingdom and including Northern Ireland is a matter under the remit of the central U.K. Government in Westminster. The U.K. Minister For Transport has exempted approximately 7 km of roads that repeatedly criss-cross the border between Northern Ireland and the Republic, as follows:
- A section of the A3 intersecting with the N54, being the usual route used to access Monaghan town coming from central Ireland; and
- A section of the A37 intersecting with the N53, used to access Monaghan and Castleblayney by traffic coming from locations east of those towns.