I like this to, but this should also be related to the territories IPC value.
Example: Germany has a IPC value of 10, then Germany has a Rail Capacity of example 5, means he rail up to 5 ground units that did’nt move in Combat Movement Phase, in the Non-Combat Movement Phase. And you should also be able to across as many linked territories you control. And maybe the IPC value of territories also should count for how many railed units a territory can receive. Example: East Poland have a IPC value of 4, you can rail up to TWO ground units per turn to East Poland. And you can only rail FROM territories that have a Railway marker!
I dont like the idea of, that a railway marker makes you can move one extra territory/space! Makes no sense, that a armor can be railed 3 territories, and infantry rail 2 territories!
Or maybe we need Railway Station Markers, so we can rail between railway station markers! But this should also be related to IPC value of territories, the railway capacity!
Sorry for my bad english, just my thoughts of this……
great idea that is what i was geting at and i like it.