The reason I really want to suggest this is because when me and my friend play we like exploring. Although we find it hard to set up connecting bases of operations around a planet. We like going into caves, mining everything we can find. As well as gathering as much research as we can. The problem comes when we get full we either have to run all the way back to the base or if we have our rovers with us we try and get them out of the cave. (I don’t know about y'all but getting the rovers out can be a pain depending on how deep you are, and if you have a smooth path. and if you cave connecting rovers it can be much harder.) My solution is having the ability to have a train system. This way it can make it easier to get from one place to the next fast and easy. (as long as you place the tracks effectively.) This system can work for exploring underground or connecting different bases on a planet together.   Pros: -Fast and easy travel -Can hold as much as a truck -Can have multiple carts (maybe max of 3-4?) -Hovers over rails so its smoother then a rover -Has rails so you can set out the exact path to take (with a rover you could accidentally crash into a small ravine or fall in a cave. Thus, having to dig yourself out)   Cons: -Expensive (could cost 4 titanium per cart and 2 titanium per set of rails? Making this more of a late game item. Also adding to the grind having to mine more and trading things more so you can get the materials you need) -Only goes from one point to another, no free exploring. (still have to use rovers early game) -More power hungry so your base will have to have sustainable energy.   Possibilities: -Could probably have a system of rails connecting multiple points. (instead of point to point it could take multiple routs.) -Rails could carry power to train so along as the base has power your train has power. (unlike rovers where you have to use up a slot for a solar panel, or something to keep it powered.) -Could have different levels of trains. (like the rover/ truck and the small/big shuttle) -Could have a specific platform like a docking station instead of using the vehicle bay (this way the rails don’t get in the way of the ships and the rovers.) -could hold a drill so you someone can dig out a path while a friend sets up the rails.   I personally think this would be an amazing addition to the game. Let me know what you think? Would this help you out in gameplay? How would you make it better?   All feedback is appreciated  The 3D model is a rough concept I quickly came up with, trying to follow the look of the rovers a bit. (concept model can always be changed.)