Fire up your 3D modelling tool and start building some rolling stock, or find out what others are previewing here. If you have questions about how to make the blueprints work or what names mean what in models, here's the place to find out your answers.
Again thankyou, these are really very very well done. The general shadow work/ shading on various details is very nice. I like the grey texture change you've made to the Union Pacific trucks....do you intend to similarly treat the wheels?