“…The previous studies show that the most important factors to investigate the development of rail transport along the corridors are gross domestic product [1, 11,27], growth of rail freight performances, Sustainability 2020, 12, 1482 5 of 22 services of infrastructure managers, transport performances [1,12], infrastructure companies [12], population [27], rail infrastructures [1,27], rail infrastructure density [27], rail carriers [1], intermodal terminals [1], capacity analysis and technical speed [1], and ERTMS implementation [29].…”