The Chicago Transit Authority (CTA) is expanding capacity along the Red and Purple heavy rail lines in the 5.6-mile segment of the corridor between the Belmont and Howard stations on the north side of Chicago. The project includes reconstruction of four stations and 1.3 route miles of guideway, a new grade-separated flyover for northbound Brown Line trains at the junction with the Red and Purple lines, installation of a new higher-capacity signal system, power substation upgrades, and purchase of 32 new railcars for expanded service. CTA estimates that the project will increase capacity in the corridor by 15 percent.