A continuation of a discussion we were/are having in the SDK Changes thread, this is a discussion about how one possible feature, allowing a unit to "wait for a train", allowing a train to "pick up passengers", and allowing trains to move units, should work, or if it should be abandoned. It is also generally about transport and travel of units, however for now I want to focus on the trains. Here are some relevant posts by Kailric and I. Here are some questions you might want to consider when discussing this: 1. Do you typically build colonies close together or far apart? I.e., would the train commands be useful? (The discussion on those commands begin in this post and ones below it in the main mod topic. 2. Should we implement "dangerous travel", such as blizzards or random events causing sickness or bad weather? 3. Would changing rivers as described above be a good or bad idea? 4. Would it be better to just make units able to move very quickly on a railroad, as if they were being transported?