The reconstructed Vinarce-Djordjevo rail line was opened to traffic on Tuesday in a ceremony in Leskovac, attended by Prime Minister Aleksandar Vucic.
Trains can now travel on this line at speeds up to 120 kilometers per hour, Tanjug is reporting.
The upgrade and reconstruction of the 15 kilometers section marks the completion of all three southern sections of the international railway Corridor 10 between Nis and Presevo, which total 46.5 kilometers, the agency said.
The total length of the rail corridor between the two towns in southern Serbia is 161 kilometers, the Serbian government announced.
The Vinarce-Djordjevo stretch reconstruction was worth approximately 9.5 million US dollars, and was completed before deadline.
Works on all three sections, worth 30.4 million, were financed from the Russian railway loan and carried out by Russian Railways company RZD International, along with Serbian subcontractors.