Zagrebački električni tramvaj

Zagreb Electric Tram was founded in 1891, the year the first horse-drawn trams started operation in Zagreb. The first electric trams started operating in 1910, and the belgian company Compagnie Mutuelle de Tramways was commissioned to build and maintain the tram infrastructure. In 1916, as money was scarce during World War I and the service worsened, the City Savings Bank bought the majority of ZET shares. To improve service, the bank invested in a new workshop for tram repairs, and later, in 1924, in the reconstruction of existing tracks and construction of new ones. In 1929, ZET took control of the Zagreb Funicular. Soon after, in 1931, after ZET merged with City Bus Transport (Croatian: Gradski autobusni promet), it took control of all busses and bus lines in the city. In 1960, it was chosen as the investor of the Zagreb Cable Car, which was opened in 1963. In 1990, the City of Zagreb became the new owner of ZET, and in 2007, it became a subsidiary of Zagreb Holding. In both 2014 and 2017, as part of a restructuring of Zagreb Holding, the City Assembly voted to make ZET once again a public company under the ownership of the city. The change happened in January 2018.

Tram

The first tram line was opened on 5 September 1891, setting off a vital part of the Zagreb mass transit system. The first electric trams started operating on 18 August 1910. Today, Zagreb features a tram network of 259 trams on 15 day and 4 night lines running over 116 km (72 mi) of tracks through 261 stations and transporting little under 490,000 passengers per day. The majority of stations serve multiple tram lines. Trams are more frequent on work days, especially during rush hour, and the least frequent on Sunday. Daytime lines come every 5-15 minutes on average.

It's fleet consists of the tram types T4YU, KT4YU, TMK 2100, TMK 2200, TMK 2300, GT6M and TMK 2400.

Bus

Bus transport was introduced in Zagreb in 1927, and was first managed by the enterprise Bus Transport (Autobus promet). In 1930, the concession was given to V. & M. Barešić & Company and their affiliate company Autobrzovoz. The City Savings Bank took control of the bus system in 1931 and commissioned the enterprise City Bus Transport (Gradski autobusni promet) to manage the lines, which later merged with ZET. Starting out small, the network has since expanded to 146 bus lines, consisting of 480 buses. The buses primarily run outside the city center where there are no trams, in the suburbs and to nearby cities, such as Zaprešić, Velika Gorica, Bistra, etc. Bus service frequencies vary significantly between lines. Timetables are available at the stops and online.

The current stock consists of MAN, Mercedes-Benz and Iveco buses, all of them low-floor. In 2007, ZET started using 10 biodiesel busses, and in 2008 it bought 60 CNG buses, but since the city had no adequate CGN pumps, the busses were barely used until 2014, when a proper pump was built. The first electric bus was put into service in April 2025.