Description/How to Reproduce  In the late game I was able to build a couple of train stations, I wanted to test this "free traveling without speeding movement points". However, when selecting a unit nearby and ordering it to go close to another train station, it would always choose the long, direct, across the fields road.... I tried to put the unit on the station directly and ordering it to go directly to the next station, would still use movment points and go "by foot". City center to city center with a train distric wouldn't work either. I tried to check if the stations had to be linked manually somehow or if they were automatic, couldn't find any information of it.

Reproducibility 5/5

Expected behavior I suppose the idea is just that a unit autmatically considers taking an alternative route over the train stations if more efficient than going "by foot" to it's destination

Note Not sure 100% if bug or I just missed something, would enjoy a more thorough description on how trains work