[28][29] Belgrade administration signed a contract with Periklos Tziklos from Milan, Italy, in 1891, regarding construction of 21 km (13 mi) long tram grid ("city railway").

[45] First chief of the tram transportation in Belgrade was Czech émigré Vinčenc Blažek, while the treasurer was Jean Salot from France.

The horses were stationed in the tram depot, built along the Tsarigrad Road, modern Depo in Bulevar Kralja Aleksandra.

[45][46] The first electric line (fourth in total, with "tracks for technical power") connected Terazije, the very downtown of Belgrade, with Topčider, at the time a suburban forest and an excursion area.

The introduction of the trams in general is today considered as a major step in the modernization of Belgrade, and victory of "Europe over the Orient".

[45] As the development of the grid became a serious and expensive task, the construction of the tram infrastructure was then assigned to the privately owned company "Belgian Anonymous Society".

Soon after the liberation of the city in 1919, the Belgrade Municipality took over the system, as the "Belgian Anonymous Society" wasn't able to repair the grid.

The tram line on the left Sava bank was partially re-established, connecting Zemun and Staro Sajmište, keeping the No.

[47] The proper work on creating the Belgrade Metro subway system began with the tenure of mayor Branko Pešić.

[51] For that purpose, the Subway section within the city administration was formed in the early 1970s, headed by Branislav Jovin, Belgrade’s chief urban planner at the time.

It was to go underground at Gavrila Principa, elevate a bit under the 36, 38, 13 and 15 Kraljice Natalije, continue under Terazije, Hotel Moskva, school in Dečanska, 17 and 26 Makedonska, 24 and 25 in Despot Stefan Boulevard, before resurfacing in the brewery's yard.

Tram routes would extend from the Pančevo Bridge via Višnjička and Venizelosova streets, exiting in Savamala and continuing to Čukarica.

During the mayoral tenure of Dragan Đilas, modern Spanish CAF trams were purchased,[47] but they weren't fit for all the tracks.

4 from Tašmajdan to Banjica, renumeration of all tram lines which would then be numbered in one sequence from 1 to 12, several new lines (Mirijevo-Vidikovac, Bežanijska Kosa-Vidikovac, Kalemegdan-Studentski Grad, Kalemegdan-Republic Square-Ustanička), shortening of the Circle of the Deuce, revitalization of the stock and introduction of the free internet, air conditioning and commuter counters, etc.

This long awaited reconstruction shall finally allow the operation of low floor trams on the Slavija-Banjica mainline (southern portion of line 9).

[71] But a request for tender, concerning the construction of the tram tracks over the bridge, was distributed by the city government only in December 2016, and it failed.

The project includes 2.7 km (1.7 mi) of a new, dual gauge tracks, with connections to the existing routes in New Belgrade and Banovo Brdo.

[72] From the New Belgrade side, the connection will be at the Đorđa Stanojevića Street, continuing over the embankment and the northern access road to the center of the bridge.

[71] Some preparatory works began in March 2018 and later that month city signed a contract with "Energoprojekt holding", which won the bidding.

[75] In January 2021, city administration announced a study to judge feasibilty to expand the Pančevo Bridge with an additional lane to carry the first tram line across the Danube.

Regarding reasons, Vesić stated that the overhead lines look ugly in downtown and that citizen complained about the noise made by the trolleybuses.

He announced that the laying of tracks will began soon and that the entire work, which would include the narrowing of the central city street, Kralja Milana, will be finished in two years.

[83] After further negative reactions, city's Directorate for Land Development now claimed that works can't start before 2025 or 2027, but president Vučić now called the entire project unnecessary.

[89] Following the counting of the commuters in October and November 2014, in July 2015[89] city government announced that, when it comes to the trams, somehow it turned out that the biggest problem is the southwest section of the route of Dvojka.

[87] Slaven Tica, professor at the Faculty of Transport Engineering, who was involved in the counting and subsequent changes in the lines of public transportation, said that "Dvojka will be improved as it showed signs of certain illnesses in its functioning...the basic problem of Dvojka is the sharp decline in the number of passengers in the zone of Vukov Spomenik".

Commentators also said that Mayor Siniša Mali and city manager Goran Vesić should be "discgraced and ashamed" for their, ironically labeled "revolutionary move".

[88][90] Though being one of the symbols of the city and enjoying the cult status among Belgraders, such a long and heated debate wasn't expected as it extended until 2017.

[88] Tica, however, maintains that Dvojka is degraded by the bus lines, that it obstructs the traffic, affects the flow on the crossroads and that making it shorter will save money for GSP.

[90] Amidst the public debate, the historic route remained intact,[57] and the tram resumed its circle in October 2017, though with some delay because of the prolonged works.

[91] However, due to the works in the Karađorđeva Street in the western section of the route, the line was shortened in November 2018 and temporarily renamed 2L.