MU allows you to have multiple locomotives controlled together, but individual train cars still generally don't have traction motors. There are specialized tra

MU allows you to have multiple locomotives controlled together, but individual train cars still generally don't have traction motors. There are specialized traincars that have motors but not generators [1] but I don't think these were what foobarian was referring to. [1] http://en.wikipedia.org/wiki/Slug_(railroad) http://en.wikipedia.org/wiki/Slug_(railroad)