Editing Blue Line (CTA) (section)

=== Forest Park branch ===
{{Congress branch (CTA)}}
After exiting the subway, the tracks continue west in the median of the Eisenhower Expressway as the '''Forest Park branch''', formerly called the '''Congress branch''', successor to the Garfield Park Branch.

Immediately west of {{cta|Racine|Blue}}, the Forest Park branch tracks diverge to permit a ramp up to the Douglas Branch elevated structure. This ramp was formerly used in revenue service from 1958 to 2008 when the Blue Line operated over the Douglas branch and the Forest Park branch.

With the replacement of Douglas branch Blue Line service with the Pink Line, the ramp is now [[non-revenue track]]age used for the transfer of 5000 series trains that the Blue Line borrows from the Pink Line for weekday rush hour service. The Forest Park branch remains in the median of the expressway through the west side of Chicago until it reaches a portal at Lotus Avenue.

At this point, the tracks pass beneath the eastbound expressway lanes before emerging on the south side of the expressway next to the [[CSX Transportation]] ([[Baltimore and Ohio Chicago Terminal Railroad]]) tracks. The route passes through [[Oak Park, Illinois|Oak Park]] and into [[Forest Park, Illinois|Forest Park]]. In the vicinity of Desplaines Avenue the tracks rise and make an S-curve north over the expressway before terminating at the {{cta|Forest Park}} station.