Because the M-21 highway flowed through the heart of the city of Bijelo Polje, it caused heavy traffic delays. As a means to alleviate traffic in the city, the Montenegrin Ministry of Transport and Maritime Affairs commissioned a project to create a bypass around the city. As a result, on 27 March 2014, the Ministry of Transport and Maritime Affairs officially realigned the M-21 highway to its current alignment. The M-21 highway would now run along the bypass, no longer running through the city.[1]
^"Informacija o prekategorizaciji dionica državnih puteva" [Information regarding the recategorisation of segments along national roads] (in Montenegrin). Government of Montenegro. 27 March 2014. Novoizgrađena obilaznica Bijelog Polja kategorisati kao dio magistralnog puta M-21 Ribarevine – Barski Most.{{cite web}}: Missing or empty |url= (help)