Tram service is the basic type of public transport in Zagreb. Regular tram transport includes 116.346 meter long tracks, 193 lead cars and 41 trailers. 15 day lines run during the day on 148 km long tracks and 4 night lines on 57km long tracks. The city has 164 switches and 256 tram stations. Trams in Zagreb transport 204.000.000 passengers a year. (Data for 2008)
Rolling stock consists of several tram types produced by different manufacturers. Croatian manufacturers are Končar and TŽV Gredelj from Zagreb, who built 16 articulated TMK 2100 trams, and Crotram consortium, also from Zagreb, who produced 140 modern, low-floor TMK 2200 trams and two low-floor TMK 2200-K tram. Đuro Đaković factory from Slavonski Brod produced 18 four-axle TMK 201 and also 19 vehicles 701 trailers. 51 vehicles TMK 301 i 351 (KT4) were produced by ČKD Praha. The same manufacturer produced 78 units of TMK 401 (T4) matching 73 trailers 801 (B4). There are 16 TMK 901 (GT6) trams produced by Düwag. There are 2 so called grinding machines as well as 2 work trams. There are 5 ploughs and 7 cargo trailers.
Trams are put in two tram depots. Depot in Trešnjevka consists of 9213.11m long gauges, 28 of which are used for parking, and 87 switches. Six vehicles on daily basis are being prepared for traffic, one type of trailer, work and cargo trams. Depot in Dubrava has 8500 m long tracks with 30 gauges and 75 switches. This depot puts in service 3 types of trams and one type of trailer.
ZET’s development plans for the near future consist of having 4 types of trams in the rolling stock: NT 2200, NT 2200-K, 2100 and modern 301 (KT4).