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The M-2.4 highway served as an extension of the M-2 highway, serving Bar and Ulcinj.
History
The M-2.4 highway was officially opened for traffic in 1973.
In January 2016, the Ministry of Transport and Maritime Affairs published bylaw on categorisation of state roads. With new categorisation, M-2.4 highway was merged with the M-1 highway.
Doderović & Ivanović 2012, pp. 483–484: "Put Pеtrоvаc – Bаr – Ulcinj – Sukоbin (јugоslоvеnskо – аlbаnskа grаnicа), puštеn је Drumski saobraćaj u Crnoj Gori u sаоbrаćај 1973. gоdine а dugаčаk је 69,93 km.."
"Pravilnik o kategorizaciji državnih puteva" [Regulation on categorisation of state roads]. www.sluzbenilist.me (in Montenegrin). Official Gazette of Montenegro. 5 January 2016. Retrieved 28 November 2019.