PKP PLK to modernise Warsaw-Bialystok and Poznan-Szczecin rail routes in Poland August 19, 2010 | Europe News Polish state-owned rail infrastructure management company PKP Polskie Linie Kolejowe (PKP PLK) SA is planning to modernise the Warsaw-Bialystok and Poznan-Szczecin routes at a cost of PLN3.2 billion. ... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password