In Serbia, they already know when passenger transport will start on the Budapest–Belgrade railway line

Train services between Belgrade, Budapest, and Vienna will commence on December 13, according to Serbian sources. The confirmation came from Ljubiša Pejičić, acting director of Srbijavoz. Transportation Minister Dávid Vitézy indicated that if the final inspections are satisfactory, trains could start operating in Hungary by the end of October. Srbija Voz is ready to launch eight daily services, with six to Budapest and two to Vienna. Travel time will be three hours to Budapest and six hours to Vienna, with ticket prices set at 35 euros to Budapest and 43 euros to Vienna.