Chicago Prepares to Unclog a Transit Bottleneck – Next City

The Chicago Tribune reports that work will begin this fall on the largest modernization project in CTA history, a $2.1 billion reconstruction project that goes by the name of Red-Purple Modernization (RPM). The overall project, which will take a total of four years to complete, will modernize the signaling and train controls and rebuild four stations on the North Side elevated, on which Red, Purple and Brown line trains operate.