Here are a few alternative schema images for a road train.
This is not a standalone modification! Copy the zip file NOT in the mods folder!
You have to install yourself the images in your vehicles.
Instructions are included.
I have again settled a folder with Big Pictures, so you can change the colors.
After the color change the images with 64×64 pixels in dds format (DXT5) save!
All images were created using paint.net and are freely usable.
schemaOverlayRoadTrain (file size = 26 KB)