EN
The authors discuss examples of solutions currently applied in the process of modernisation of main railway lines undertaken by the Polish PKP PLK S.A. in order to =assess compliance with the applicable environmental conditions. The solutions described pertain to nature conservation and restoration in the vicinity of railway routes. They are developed according to three assumptions: protection of animals along transport routes; traffic noise reduction; natural compensation which consists in restoration of the lands adjacent to railway lines in order to enhance water regimes and habitat conditions for animals.