Geo Experience: All aboard!
The amount of rail data that is freely available, increases every day. Have a look at these railway stations in England and Scotland, for example. Click on a station to get information about the annual numbers of passengers entering, exiting and changing trains. For the purpose of this map, the data were downloaded and republished. But nowadays many of these datasets can be retrieved directly from the source, if published using internationally accepted standards. This makes maps and derived data more reliable than before.
Sources: UK Department of Transport (station locations), Office of Rail Regulation (passenger numbers).