The models I have planned for my own route include a front end loader, construction crane, cement mixers & cement works, dump trucks of various makes, a back hoe, a road grader, Big Bertha steam shovel. Anything that digs in dirt, really. Fire engines as well; I have noticed there is nothing. So, also add a fire house. Plus cars and trucks from all eras. Done right, my route could be construed as the land that time forgot for a spell, where nothing really changed between 1950 and the information age. The SceniCruiser was a natural fit.
Her is the front end loader's progress. I spent some time learning blender bones to get the pistons to rig correctly. The helps with posing, and paves the way to animation.