| skos:altLabel | - Blue
- Blue Line
- Blue Lines
- Blue Line (CTA)#Congress Branch
- Blue Line (CTA)#Forest Park branch
- Blue Line (CTA)#History
- Blue Line (CTA)#O'Hare Branch
- Blue Line (CTA)#O'Hare branch
- Blue Line subway
- CTA 'L' (Blue line Line)
- CTA Blue Line
- CTA Blue Line Station Improvements
- Congress Branch
- Congress Line
- Congress, and O'Hare branches
- Dearborn subways
- Forest Park Branch
- Kennedy Extension
- Kennedy and O'Hare
- Logan Square
- O'Hare Extension
- West-Northwest Line
- rapid transit line
- <span style=\"background:#;color:white\">'''Blue Line'''</span>
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