TPF Sp. z o.o. has implemented for PKP Polskie Linie Kolejowe S.A. the following service: Pre-project documentation development for the project called The works on the remaining railway lines, independent from the alternative trasport sequence Bydgoszcz - Trójmiasto, tangent lines and Chojnice railway nod.

The subject of the study analysis were the rail lines, which belong to the alternative transport sequence Bydgoszcz – Trójmiasto, including the adjacent infrastructure, 208 Działdowo – Chojnice rail line, in the section from Wierzchucin station to Chojnice station, 203 Tczew – Kostrzyn rail line in the section from Tczew station to Wierzchowo station, 215 Laskowice Pomorskie – Bąk rail line in the section from Śliwice stop to do Bąk station, 210 Chojnice – Runowo Pomorskie rail line in the section from Chojnice station to Człuchów station, 743 Lipowa Tucholska – Szlachta rail line from Lipowa Tucholska station to Szlachta station, 744 Lipowa Tucholska – Szlachta Zachód rail line from Lipowa Tucholska railway station to the post of the found Szlachta Zachód station. The designed rail line Człuchów – Wierzchowo Człuchowskie.

The scope of the order included the implementation of feasibility studies within the socio-economic, marketing, traffic, technical, environmental, financial, geological and geotechnical analyses.