TPF Sp. z o.o. has implemented for PKP Polskie Linie Kolejowe S.A. the following service: Pre-project documentation development for the project: „The works on E75 line in the section Białystok – Suwałki – Trakiszki (country border), stage II section Ełk – Trakiszki - country border.

The subject of the study analysis was E75 rail line Białystok – Suwałki – Trakiszki -country border. E75 rail line is a part of transport corridor Morze Północne – Morze Bałtyckie, which is a part of basic network Trans-European Transport Network (TEN-T). It is an element of Rail Baltica transport sequence within regional, inter-regional and international connections. It is UE high priority project, which includes the upgrade of transport corridor connecting Warsaw through Kowno and Riga with Tallinn. E 75 line falls under AGC i AGTC agreements.

The scope of the order included railway connection in the section Ełk - Olecko – Suwałki – Trakiszki (country border) for which it was implemented the feasibility studies within the socio-economic, marketing, traffic, technical, environmental, financial, and geological and geotechnical analyses.