The Blue Line is a 26.93-mile-long Chicago "L" line which runs from O'Hare International Airport at the far northwest end of the city, through downtown via the Milwaukee–Dearborn subway and across the
A Blue Line train of 7000-series cars at Jackson station
The Blue Line terminal at O'Hare International Airport
Clark/Lake station on the Milwaukee–Dearborn subway
The Blue Line tracks in the median of the Eisenhower Expressway; The main line straddles the Loomis Ramp which leads to the Pink Line