In the 19th century Plzeň, thanks to new industrial enterprises, the town was growing so fast that it needed an acute solution to the difficult traffic situation, as horse-drawn carriages could no longer provide reliable transport.

[1] František Křižík drew up the plans for an electric tramway; his company then carried out the construction of the line partly with Škoda.

After World War II, the section to Skvrňany was double-tracked and in 1949 the entire tram line Lochotín–Doudlevce was cancelled and replaced by trolleybuses.

[4] At the turn of the 1950s and 1960s, new housing estates began to be built that required transport connections, which pushed the authorities for the further development of the network.

Košutka and Bolevec, in the north of the city, have had a tram line to replace the inadequate trolleybus service since the 1980s; not long after a large housing estate was built there.

However, the Bolevec line was not completed in its entirety at this time, but only halfway; it has only been serving the public in its present form (including the northern section) since 1990.