By using rail maps of modern cities, people could play for their own modern day home town.

Instead of countries play for stations, and instead of continents play for lines.

This could be applied to cities all over the world.

Places like Merseyside (Where i live) that don't have a rail network as ...

On a similar theme, could this idea be applied to games based on real places ie Fallout? The Capital Wasteland in Fallout 3 is Washington DC just flattened. As Washington DC is a real place does that make it easier to avoid copyright issues?