Here is how I created the scenery seen on the image.

As first, place a single track on the ground:

start with a single track

Then, add some switches and track continuations (see for details about how to do it):

add turnouts and further tracks to a single track ending

After that, add even more track continuations and place more engines, waggons on the newly built tracks. Also add an overpass to the scene making it even more interesting:

add engines waggons overpass

Put on roads, truck, signal:

add roads vehicles signal

As a last step, add vegetation and buildings to the scene. Enjoy!

add vegetations and buildings