The city of Osijek is located in the east of Croatia near the Hungarian border and has a population of approx. 100,000. It has a small, metre-gauge tram network with two lines and a route length of about 12 kilometres. It is operated by the municipal company → GPP (Gradski prijevoz putnika Osijek).
The Serbian capital Belgrade (approx. 1.2 million inhabitants) has a tramway network with a length of about 40 kilometers. The Belgrade tramway runs on metre-gauge tracks. The tram and bus network is operated by the municipal transport company → GSP (Gradsko saobraćajno preduzeće Beograd).
The Sarajevo tram has an 11 kilometre long route, which runs across the city in East-West direction and to the suburb Ilidža west of Sarajevo. There are three intermediate loops and a short branch to the station. Since every possibility (terminating at intermediate loops and trips to the station) has its own line number, there are six lines. This 'network' is operated by a municipal company called → GRAS (Gradski Saobraćaj Sarajevo).