^As of March 2025, the network counts 10 tramway lines and 5 tram-train ones. All 15 lines have their own tracks independent from each other, there's no interlining. The circular T3 is split into two independent lines, T3a & T3b, each with their own terminus station where they meet. Two of the lines, T5 & T6, use Translohr single rail rubber-tyred trams. T6 features a tunnel section with two underground stations. T7's South & T10's North extensions will both also have tunneled sections and underground stations. The network is rapidly growing, with 4 newly built lines and 1 converted line since 2021, plus large extensions in various stages of development. It should exceed 250 km once all extensions currently being planned or built are completed.
^Some stations are used by several lines; this number is the sum of each line's stations counted separately. The true number ranges from 450 to 500.
^The network counts 17 urban lines and 2 interurban ones: one of the latter has been suspended since 2011 and is currently replaced by buses.
^240 km of double track plus 55.5 km of single track for a total route length of 175.5 km.
^This reference ("Urban transport – History of Sofia Trams". Sofia Urban Mobility Center. 2015. Retrieved 2015-03-01.) quotes the 2006 single track length of Sofia's tram network to be 308 kilometres (191 mi) – for the purposes of this table, the double tracksystem length of Sofia's tram network is assumed to be roughly half that figure, or approximately 154 kilometres (96 mi).
^The Annual Report 2020 lists the total single track length of Warsaw's tram network to be 303 kilometres (188 mi), of which 40 kilometres (25 mi) is the length of tracks at depots. For the purposes of this table, the double track system length of Warsaw's tram network is assumed to be roughly half the difference, or approximately 263 kilometres (163 mi).
