The game asks for these mods to be saved, you can download links:
Viewing post in JWeezy's Railroad Savegame comments
I made my own Savegame with the Factorys and place some mods from Lambo mods and ohter Factorys for Platinum DLC and i must not drive across any roads. There are some Fields near the Vehicle spawnplace. I have place by the Railroad for spawn Trains and Wagons without must picup with any others for driving. I have Terrafarm in the mods Folder for the other Filltypes for Lambo mods.