alptram.zip is a release file of the Minecraft resource pack IR Riffelalp tram. It was published on June 20, 2021 and is 0.6 MB in size. For the full description, screenshots and every other version, visit the IR Riffelalp tram resource pack page.
How to install: Put the .zip into .minecraft/resourcepacks (do not extract it) and enable it under Options → Resource Packs.