It connected Kolašin and Andrijevica with Peć and Priština in Kosovo, and Leskovac and Pirot in Serbia.

[2] Following the breakup of Yugoslavia, the segment between Murino and Peć was closed during the Kosovo War in 1999.

An additional 12 kilometres of road was planned to be asphalted between Čakor and the Kosovar border.

On 27 March 2014, the Ministry of Transport and Maritime Affairs officially realigned the M-9 highway to its current alignment, incorporating the Vladoš Bridge, while downgrading the M-9's former path through Kolašin as a municipal road.

[4] In January 2016, the Ministry of Transport and Maritime Affairs published bylaw on categorisation of state roads.