Light rail subway, tram, planned metro
Krakow's first tramwaje opened in 1882. It now has 28 lines covering a 86.5 km.
The 4 station subway section of Krakow's light railway opened in December 2008. The tram line is
known as the "Fast Tram", as opposed to Krakow's other streetcars,
perhaps known as slow trams.
In 2009, plans for a two line metro were announced. This wouldn't be the first time Krakow planned for a metro. Plans in the 1970s and1980s actually produced several tunnels under Krakow which are now part of the new tram tunnel. The section under
the railway station was built in 1975 in the event a metro might be built. The section under Lubomirskiego Street was built in the 1980s, and the far eastern and western sections of the tunnel were built in 2000.
Since the majority of the existing tunnel has been built to light rail (stadtbahn) standards, speculation of a new 3 line metro bypasses the existing tunnel, leaving it for it's current use for light rail and streetcars. While plans for the new 17 km Krakow metro have been approved, funding is still being sought for a 2018 ground breaking. The partially underground Krakow subway could end up using new Axonis light metro rolling stock.
tram official home page
Wikipedia page (Polish)
Krakow Metro Unofficial Home Page
light rail line by Urban Transport Technology
Krakow dreams of a metro
Awesome pics from Skyscraper City