BELGRADE (Serbia), January 5 (SeeNews) – Serbia plans to complete the construction of some motorway subsections that lead to the Bulgarian border and to step up work on the southern leg of Corridor X towards the Macedonian border this year, local media reported on Thursday. Work will also be stepped up on the motorway section from Belgrade to the Southern Adriatic, broadcaster b92 said (www.b92.rs) reported, quoting the director of state-owned company Koridori Srbije, Mihajlo Misic.