Minister of Construction, Transport and Infrastructure Aleksandra Sofronijević, Director of Koridori Srbije Aleksandar Antić and Director of the Shandong Serbia branch Chang Xuxian signed today in Belgrade the commercial contract for the design and execution of works on the construction of the Class I state road Vožd Karađorđe – Phase 1, Section 2 and Section 3, spanning 82.71 kilometres.