Here's my idea for a new bus route:
#199 Loop-Medical District bus line. This line would operate daily - 7 days a week - from 4:30 a.m to 1:15 a.m. between the Jackson Blue line and the Polk Pink line stations. It would operate westbound via Dearborn, Adams, Clark, Harrison, Paulina, and Polk to the Polk Pink line station. It would then turn around via Polk, Damen, Harrison, Wood, and return to Polk for the eastbound trip via Polk, Paulina, Harrison, and Dearborn to the Jackson Blue line station. This bus line would be perfect for Pink line passengers who need direct trips to O'Hare, and also passengers who need to get on the Pink line going west.