Serbian President Aleksandar Vucic and President of the European Commission Ursula von der Leyen attended today the marking of the beginning of works on the modernisation and rehabilitation of the Nis-Brestovac railway, and the signing of the Agreement between the public company Corridors of Serbia and the consortium of Strabag AG and Strabag d.o.o. Beograd on the construction of the first phase of the Highway of Peace on the Merosina-Merosina 1 section.