Board Thread:Questions and Answers/@comment-107.10.143.192-20131103035931

why is it that some train sets have deisel engines but carry passenger & mail. that gives a 45% bonus & if passenger wagons are in set with electric engines you will get 100% bonus right? i thought cargo went with deisel engines & passenger & mail went with electric engines in order to get the best bonus. i'm confused..easily. lol. 