Shinkansen tracks based on the original Railway tracks:
https://gtm.steamproxy.vip/sharedfiles/filedetails/?id=1569088356

Also check requirements for each workshop item.

The props on these are custom and are not controlled by Railway Replacer and are not related to the original Railway tracks.

The middle catenary doesn't disappear, as these tracks have a special curved wire segment with droppers.

Elevations are handled differently - elevated is a sort of embankment, and bridge is a plain borderless elevated track.

Railway Replacer can be used to put these shinkansen tracks on any station. There is one elevated one-sided boarding station track which was added specifically for the himeyama station, as people waited on the outside of the station for some reason.