In recent years, there has been a noticeable uptick in ridership across CTA rail lines. To assess the implications of this growth, the CTA has undertaken a thorough system-wide examination of rail line capacity. This involved analyzing existing congestion levels on each rail line and identifying sections that are currently operating at full capacity or are projected to reach capacity limits in the near future. Furthermore, the study explored the interplay between capacity and physical constraints impacting the CTA's ability to manage crowded conditions effectively. Additionally, a range of potential solutions at a high level was iden/fied for further exploration, aimed at mitigating capacity issues and addressing overcrowding on the rail system moving forward.

The Chicago Transit Authority (CTA) is embarking on a significant overhaul of the Blue Congress Line, including the renovation of Racine Station and the establishment of a new substa/on at Morgan Street. With origins da/ng back to 1958, many of the infrastructure assets along the Congress Line are original and have exceeded their intended lifespan. The Phase 1 of the Congress Line Improvement project marks the first step in a broader four-phase endeavor aimed at completely reconstructing the entire Blue Congress Line. Phase 1 enhancements cover the stretch from the Dearborn south subway portal near Halstead and Congress Parkway to the western terminus of the Illinois Medical District (IMD) Station.