The Chicago Transit Authority (CTA) plans to reconstruct the Red and Purple elevated heavy rail lines in phases between the Belmont station on the north side of Chicago and the Linden station in Wilmette. The work will expand capacity and bring the infrastructure into a state of good repair. This project is the first phase of that effort, and will improve the 5.6-mile segment of the corridor between the Belmont and Howard stations by reconstructing four stations and 1.3 route miles of guideway, constructing a grade-separated flyover for northbound Brown Line trains at the junction with the Red and Purple lines, replacing the signal system, making power substation upgrades, and purchasing 32 new railcars for expanded service. The total capital cost of the Phase One project, including state of good repair elements, is estimated to be $2.131 billion in year-of-expenditure (YOE) dollars. The estimated capital cost of the Core Capacity component, which is the subject of the Federal Transit Administration’s evaluation and rating process, is shown in the table above. CTA estimates that when it is complete, Phase One will increase capacity in the corridor by 15 percent, which exceeds the ten-percent minimum required by law for Core Capacity projects.