tram, light rail
Poznan has 66 km of tram lines, all of which converge into a 6.1 km light rail section built into an open cut section in 1997. Known as the Pestka because of it's pesky habit of imitating a full metro, the 6 station line connects Poznan's city center with the northern suburbs. A two km extension
opened in 2012., including a 900 meter subway section on the new Franowo route.
Because of it's success, conversion of an existing tram line into a light rail line in Poznan's eastern suburbs began in 2005 and is expected to be completed somewhere around the turn of the century. It will also include
a 1 km subway tunnel.
View of the Poznan subway
Poznan's tramway system opened for business in 1880 and was electrified in 1896. The system nearly went bankrupt until it's German owners changed the signs on the lines from German to Polish, thus discouraging a widespread boycot of the system. Currently, numerous extensions are planned.
Wikipedia page - Tramways in Poznan
Wikipedia page - Poznan Frast Tram