Historical clue formulations

• Org. that offers one "L" of a ride? — 2026-03-18
• Org. that runs the "L" — 2026-02-26
• Windy City commuting org. — 2025-07-13
• Windy City commuters' inits. — 2023-12-01
• Overseer of Windy City buses and trains, in brief — 2023-07-02
• Windy City rail system, in brief — 2022-05-11
• Org. that runs Windy City trains — 2021-01-18
• 'L' train overseer, for short — 2019-02-28
• Windy City rail org. — 2018-07-19
• Windy City rail inits. — 2018-04-03
• 'L' overseer — 2018-01-05
• Inits. for getting around the Loop — 2017-12-17
• Second City train inits. — 2017-12-14
• 'L' train overseer — 2017-05-10
• Windy City 'L' overseer — 2017-02-28
• El operator in the Windy City, briefly — 2017-01-08
• Windy City transportation inits. — 2016-11-10
• Second City subway org. — 2016-08-05
• El-overseeing org. — 2016-05-10
• Midwest transportation inits. — 2015-12-25
• Inits. for Windy City commuters — 2015-08-18
• It runs the 'L' — 2013-10-22
• Windy City commuters' inits. — 2012-10-14
• Windy City rail inits. — 2011-11-27
• El-overseeing org. — 2011-03-08
• L overseer — 2010-10-24
• Windy City transportation inits. — 2010-05-02
• Windy City transportation org. — 2009-10-28
• Windy City rail inits. — 2007-01-05
• Windy City rail inits. — 2006-02-03
• Windy City transportation org. — 2005-07-21
• Loop group: Abbr. — 2004-08-12
• Windy City transportation inits. — 2000-07-15
• Windy City rail agcy. (in NECTAR) — 1999-06-06