In 1934 the railway line in Vítkovice (operated by the Vítkovice Ironworks company) was also electrified. In the late 1940s and early 1950s the various companies providing tram services in Ostrava were merged to create the Ostrava City Public Transport Corporation (). During the communist era new tram lines were built to link the central parts of the city with the new satellite estates (Poruba) and factories (Nová Huť). After the Velvet Revolution in 1989 most tram-building projects were stopped, though a new section running along Místecká Road was opened in the late 1990s.