VeTrack: Click on Data Layer at bottom right, then Land Use. It's all the blue buildings aka commercial, make sure you have cargo vehicles going to those. And next time, don't forget to check which forum you're in before posting. ;)
bolero3232: I will check Land Use, thanks.
As far as I can tell, I am in Transport Fever General Discussions. Is this the wrong forum for my question?
You're in the big General Forum.
Edit: the below applies if you're using the website to access the forum. For Galaxy users, I guess something else happens.
gOg don't really point this out, but nearly every game or series has a subforum where you can find targeted info about the game in question. To find them, click the Community tab up top. On the left-hand side of the screen, down just a bit, you'll find a heading for "Game specific forums". Just to the right of that is a search box. Type in there and you can find specific subfora. Once you found the ones you plan to go to periodically, be sure to check the little checkbox on the right; that will make sure that subforum will show up in your forum list on the left.
Subfora are not automatically added to your list when you purchase a game, so if you want them to show up in that list then you'll need to add them manually. And don't forget to check that little box if you want easy, periodic access.