"tourist train". There is also an impromptu recreational marina on the island's downstream end. There are plans to expand this marina and make it permanent. Boating in the lake, as well as car traffic on land, is strictly forbidden. There is a large parking lot on the Makiš side of the river. In 1922 company "Čavlina and Sladoljev" from Zagreb drafted the project of connecting two banks of the Sava river by the cable car. In 1928, building company "Šumadija" again proposed the construction of the cable car, which they called "air tram" but this project was planned to connect Zemun to Kalemegdan on Belgrade Fortress, via Great War Island. The interval of the cabins was set at 2 minutes and the entire route was supposed to last 5 minutes. The project never realized. Engineer and CEO of the Yugoslav institute for urbanism and dwelling "Juginus", Mirko Radovanac, revived the idea in the 1990s. After conducting extensive surveys (traffic analysis, interviews with the commuters, climatic, geological, urban and other researches), "Juginus" presented the project in 1993. They proposed that the terminuses should be at the Sports Center Košutnjak and Block 44 in the neighborhood of Savski Blokovi in New Belgrade, across the Sava. Stops in between would include the major public transportation roundabout in Banovo Brdo, Makiš and Ada Ciganlija, five in total. They called it the "ideal route". The plan also included construction of commercial areas around the terminuses, which would cover and help with the profitability of the project. Apart from being ecological and an attraction, it was estimated that it would shorten the trip for 45 minutes. City government included the project into the city's General Urban Plan, which envisioned the construction in phases, the first being a long section Block 44-Ada Ciganlija. It would lay on 8 steel pillars, above the ground and the trip would last for 3 minutes. The cabins were projected to receive not just the commuters, but also the bicycles, skateboards, sledges and skis, as the cableway was planned to work year-round. The complete facility would have of 27 pillars, it would be long which would be travelled in 15 minutes by 2,000 commuters per hour. Despite the project has been publicly revived by the mayors Dragan Đilas (2008–2013) and Siniša Mali (2013–2018), it remained on hold. The idea was included in the Belgrade's General Regulatory Plan in December 2021, including two