a) Carrying out design projects and necessary revisions in the 158 km section between İnönü and Köseköy, in accordance with the high-speed train application projects and the approximately 59.6 km 3rd line displacement on the route, in order to operate independently from the existing lines: -Making necessary revisions to the bridges and viaducts of High Speed Train Lines and making revisions according to the post support of the viaducts, -Design of new engineering structures (tunnels, bridges, viaducts, overpasses, culverts) required to eliminate at-grade intersections with existing lines on the route. -Conducting necessary soil surveys -Additional map acquisition -Expropriation projects of the entire route and Hasanbey Triage Station b) Design of approximately 5 km Eskişehir Train Station Passage (Approximately 3 km tunnel, 2 km U section) c) Preparation of Hasanbey Station Triage Station application projects. In this context, preparation of the application projects of Architectural, Static, Reinforced Concrete, Electrical and Mechanical facilities of a total of 8 buildings (Station, Loco Maintenance, Wagon Maintenance, Section Chief, Administrative and Social Building (Cer Building), Road Directorate Logistics Hangars and Social Facilities) (Hasanbey Triage Station application projects correspond to 1/3 of the total amount of work.)