The June 1988 issue of MassTransit mentioned an upgrade of the Bytom to Katowice tranway that wouldtie in with the Katowice subway. Huh? What Katowice subway? According to the tramway's nycsubway page, the only tunnel on the Katowice tramway system is a tunnel of vegetation.
What the Katowice tramway network does have is 207 km of street running and interurban lines. Thirty two lines in all, Count 'em. Thirty-two.
History of tramways in Katowice
Urban Rail page