It would actually follow the route of the Pariska Street, between the streets of Gračanička and Uzun Mirkova. This would allow for the ground level to be transformed into the plateau with a fountain, which would make an extension of the pedestrian zone of Knez Mihailova Street and create a continuous pedestrian zone from the Republic Square and Palace Albania to the Kalemegdan Park, the Belgrade Fortress and the rivers. It was envisioned by the first phase of the planned Belgrade Metro, 1973-1982. A bit longer version, from the Gračanička Street to monument of Rigas Feraios in the Tadeuša Košćuškog Street, resurfaced in 2012, in conjunction with the project of connecting the Savamala port and the fortress. In March 2012 it was announced that the construction will start by the end of the year. However, the planners from the 1970s version were against the execution, because they believed that the entire complex can exist only if there are already functioning subway lines, which as of 2018, are still not built. This way, the traffic problems won't be solved. Do to the price, general halt of the subway construction and constant changes in its routes, the project hasn't materialized yet.