A1 road continues to be N1 road and M1 motorway at a city that had how many inhabitants in 2016 ?
A1 road (Northern Ireland):  It runs from Belfast via Lisburn and Banbridge to the border with the Republic of Ireland south of Newry, from where the road continues to Dublin, becoming the N1 road and M1 motorway. Dublin:  The population of the Greater Dublin Area, as of 2016 , was 1,904,806 people.
1,904,806 people