To be honest this 20 minute rule worries me somewhat. In previous transport games I enjoyed it when I had to transfer goods to big distances with big long trains. Does it mean we will never be able to transfer goods to high distances? Not usre if the speed of the modern engines is enough to do these distances in less than 20 minute. Maybe if you make a direct connection between the source and the target, but the best would be if you could just use the existing complex rail network to transfer the stuff. Maybe if the limit wouldn’t be fix, but depend on the distance?