I like to imagine this is what budget Snowpiercer would look like.
This particular piece I was really struggling with composition. I wanted to show the engine details but also not have a shot from the side. I think I have a decent middle ground now, gotta finish your work at some point right.
The awesome tram model: https://www.cgtrader.com/3d-models/vehicle/bus/tram-km
Human scans: https://www.3dscanstore.com/
Grass and trees: https://blendermarket.com/products/botaniq-trees
There is also stuff from Bridge and random things from all over the internet!