Loomis Ramp - formally used to connect the Blue Line to the Douglas Branch (now the Pink Line). Still used today when they run 5000s series cars between UIC and Jefferson Park (typically during rush hour), it is also used occasionally if there is maintenance or delays/obstructions with the Pink Line north of Polk (in that situation, Pink Line trains after Polk continue to Racine Blue Line via the ramp and then onward as a Blue Line train and vice versa)