I'm back after a long hiatus! Since winter is approaching, I figured it was time to finally get some track laid and get some things rolling! I'm not really sure how to word this question...I don't have all the "lingo" down yet. So I'll just be firing from the hip here: Most rolling stock have road names on them. How prototypical would it be for a loco to haul freight with other names? IE: If I'm modelling NKP, is it realistic for a B&O (or others) boxcar to appear in the train?