To help you create the right text, here are a few ways you might describe this file depending on your needs:

"Check out my latest project, ! This file includes a fully functional city-themed route with over 50km of track. Just extract the contents into your 'Add-ons' folder and enjoy the ride."

is a compressed archive file typically associated with custom maps, mods, or assets for railway simulation games like Trainz , Open Rails , or Microsoft Train Simulator .