Historic
Jackson station
Jackson is an "L" station on the CTA's Red Line in the Loop. Free transfers to Blue Line trains are available at this station via a lower level transfer tunnel to the Jackson station in the Milwaukee–Dearborn subway and farecard transfers to Purple, Orange, Brown and Pink Line trains are available via the Harold Washington Library–State/Van Buren Loop Elevated station.
Like the Washington station, the northern extension of which was reconfigured as the Lake station, Jackson was originally double-length, with a third station mezzanine at Van Buren Street and Congress Parkway.
Source: Wikipedia / Wikidata
Nearby