Ninety-five per cent of the existing system, Beovoz, is a classic railway connecting the downtown with suburbs, but it also has a modern underground station that would become the central subway station under the project.
Devedeset i pet posto postojećeg sustava, Beovoz, čini klasična željeznica koja povezuje centar grada s predgrađima, ali također i moderna podzemna postaja koja će prema projektu postati središnja postaja podzemne željeznice.