Abbr. on Windy City buses, 3 letters
Bus org. in Ebert's city, 3 letters
El overseers, for short, 3 letters
Employer of Michigan Ave. bus drivers, 3 letters
Initials on a Windy City el, 3 letters
Initials on Windy City els, 3 letters
It loops the Loop: Abbr., 3 letters
Letters in the Loop, 3 letters
Letters on Windy City buses, 3 letters
Letters on Windy City trains, 3 letters
Org. with a blue line to O'Hare, 3 letters
Overseer of els: Abbr., 3 letters
Second City transportation agcy., 3 letters
State educators' gp., 3 letters
Their Orange Line goes to Midway (abbr.), 3 letters
Transp. group in the Loop, 3 letters
Windy City commuter org., 3 letters
Windy City L runner, 3 letters
Windy City rail agcy., 3 letters
Windy City rail agcy. (in NECTAR), 3 letters
Windy City rail and bus agcy., 3 letters
Windy City rail inits., 3 letters
Windy City rail letters, 3 letters
Windy City rail org., 3 letters
Windy City rail system (abbr.), 3 letters
Windy City rail system, briefly, 3 letters
Windy City train initials, 3 letters
Windy City transportation gp., 3 letters
Windy City transportation inits., 3 letters
Windy City transportation org., 3 letters