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Nowadays, rail traffic is expected to evolve into a new era of “smart rail mobility”, which requires a seamless high-data rate wireless connectivity with up to dozens of GHz bandwidth. Such a huge bandwidth requirement motivates the exploration of the underutilized millimeter (mm) wave and Terahertz (THz) bands. In this paper, six scenario modules for mm wave and THz train-to-infrastructure channels are defined and constructed for the first time. All the main objects, such as tracks, stations, crossing bridges, tunnels, cuttings, barriers, pylons, buildings, vegetation, traffic signs, billboards, trains, etc., are modeled according to the typical geometries and materials in reality. Preliminary ray-tracing simulations in the 60 GHz band with 8 GHz bandwidth show that these objects that might not be so impacting on lower frequency channels indeed influence mm wave channel properties, and therefore, they can even play a …