BeNeLux Wiki in English, translation into other languages is started...
In the BeNeLux railroads, metros and tramways are mapped with the Railroad road type to provide drivers with visual orientation. Tracks that are embedded in a road surface or a median strip should not be mapped.
- Railroads should be mapped uninterrupted. No junction nodes at city borders.
- No connection to segments of any other road type besides Railroad!
- No City name and a fixed Street name.
- An elevation of -5.
For other means of public transport there are other guidelines, for instance pedestrian boardwalks used for public transport.