Identifying Potential Areas for New Railway Lines across Different Relief Roughness of Austrian Landscapes

Abstract

This work presents an operational model to identify potential areas for new railway lines in Austria, utilizing a topographic and passenger potential and considering the different inclination requirements for regional and main railway lines. By applying a GIS digital terrain model based on a 500 m squared reference system, we identified 61,497 cells suitable for new regional lines and 11,347 cells suitable for main railway lines. These cells show a variety of spatial potential classes. Out of Austria’s 83,883 km² total surface, all these identified cells sum up to an area of 15,374 km² for new regional lines and 2,837 km² for new main lines. We validate the identified cells with existing and abandoned railway alignments. The model shows a fit of 80%. Furthermore, we put the results into perspective by comparing individual cell potentials with their public transport quality levels of existing supplied services, and we apply a five-scenario sensitivity analysis to identify the impact of the model’s foundations. After debating the model’s particularities and their impact on planning procedures, we conclude that our model is more comprehensive than today’s strategic rail transport planning procedures, primarily based on political desires or selected expert suggestions.