AJ's modern freight.zip is a release file of the Minecraft resource pack (Immersive Railroading) AJ's Modern American Freight, made for Minecraft 1.12.2. It was published on July 5, 2020 and is 4.4 MB in size. For the full description, screenshots and every other version, visit the (Immersive Railroading) AJ's Modern American Freight resource pack page.
How to install: Put the .zip into .minecraft/resourcepacks (do not extract it) and enable it under Options → Resource Packs.
