This is a maintenance category, used for maintenance of the Wikipedia project. It is not part of the encyclopedia and contains non-article pages, or groups articles by status rather than subject. Do not include this category in content categories. This is a hidden category. It is not shown on its member pages, unless the corresponding user preference (Appearance → Show hidden categories) is set.

This category tracks articles that use {{Infobox station}} without a value in |opened=, |start=, |opening= or |starting=.

The inclusion of an article does not always indicate an error, particularly for stations use the "key dates" (|years=, |events=, etc.) timeline format.