The present project aims to prepare the technical technical content detailed below, such as: Preparation of MT, CBA, licensing plans, obtaining official licenses, preparation of construction tender documentation. The Püspökladány — Biharkeresztes oh. national core network railway is part of the trans-European rail freight network. The railway track is single-track, the currently applicable axle load is 210 kN. The authorised track speed is 100 km/h, but a significant number of constant and temporary slow signals are present on the line. The aim is to meet the parameters expected by the EU in the planned developments. Ensuring a minimum speed of 100 km/h and improving equal opportunities conditions. It is possible to determine the exact technical content after the feasibility study has been completed. Overhead contact line, substation and power work: Construction of electric overhead contact line from Püspökladány to Biharkeresztes-oh. phase boundary, single-track track, stations and traffic detours, 55.6 km length. The local and remote monitoring of the overhead contact line equipment is carried out from the centre of Debrecen. In order to ensure the energy supply, a new substation is needed in Berettyóújfalu with the construction of a 4 km power line. Together with the construction of the overhead contact line, FET-HETA equipment is being built, which will be connected to the planned FET centre in Debrecen: With the exception of the Berettyóújfalu — Mezőpeterd, Biharkeresztes-oh. sections of the Berettyóújfalu — Mezőpeterd, Biharkeresztes-oh., which will be rebuilt by MÁV Zrt., it is necessary to rebuild open lines and the current 48th system of cross-border and preventive tracks of stations with a 54th system superstructure. The construction cost was determined by applying a specific price of 250 mt/km. The stations are equipped with reinforced concrete detours, sk+ 55 cm high platforms, rain stops with the necessary track breakdowns. Telecommunications and interlocking works: The entire length of the line network is based on optical fibre cables fixed on the columns of the overhead contact line system to serve the interlocking and telecommunications needs. Existing line equipment and station-based mechanical devices will remain in place to ensure their protection.