Historical clue formulations

• Station locations — 2025-01-12
• Bus stations — 2023-10-09
• Stopping points — 2015-06-28
• Stations — 2013-03-31
• Points on some lines — 2009-06-21
• Stops — 2002-09-01
• Stops on a line — 2001-12-20
• Bus stations — 1998-08-03
• Stopping points — 1996-06-22