In January 2016, the Ministry of Transport and Maritime Affairs published bylaw on categorisation of state roads.[1] With new categorisation, new R-4 regional road on this route was established from previous municipal road.
^ ab"Pravilnik o kategorizaciji državnih puteva" [Regulation on categorisation of state roads]. www.sluzbenilist.me (in Montenegrin). Official Gazette of Montenegro. 5 January 2016. Retrieved 18 June 2017.