runic saddle
The ability to pave road for our rovers would be fun and practical for getting to other player bases or just to make the rover even more useful.
Some ideas, give it a player speed buff to make it worth using and let us actually pace the road by using a road paving vehicle. A jack hammer of some kind would also be fun (bonus points if there's a pressurized variant that doesn't use electricity) to rip up any mistakes.