This is a paid asset, but now you can download Animated Steel Coaster Plus for FREE, but please remember this package is provided only for learning purposes or to be able to test before buying the product, NOT FOR COMMERCIAL PURPOSES.
Detail this asset from Unity Store: Original Link
Animated Steel Coaster Plus v2.12
(Tested with Unity version 2020.3.23f1)
Steel rollercoaster with physics based animation.(baked to keyframes)
– Plus: Create your own tracks with the included prefabs for Tracks and Rails by Zen Fulcrum LLC
– Online documentation, status and release notes
– Drag and drop prefab with controller script for easy adjustment of trains and animation velocity
– Sound
– Simplified collision meshes
– Drag and drop station prefab for use with Tracks and Rails
(not included!) Nature assets from the video:
Nature Pack
Forest Pack