Private train cars are the most interesting part. I wonder how signaling works? Does each house/"station" have its own fork in the tracks for getting their private train car home?
Looking at the map, it seems there are only two endpoints to the line on the island.
On the other hand, https://en.m.wikipedia.org/wiki/Nordstrandischmoor claims there are only 4 households on the island, so even assuming each has its separate fork, “each house” isn’t that much.
I wonder what system they have to prevent the two locomotives from meeting each other half-way through and to get one of the locomotives to a home when needed.
Also since the area is 100% flat eyesight should be enough.
Also, you don't really need forks, because are light enough to be lifted off the tracks. Some pull them up on special car trailers.