The Chicago Transit Authority is calling the project “historic.”

One thing is for certain. Two things actually. The public transit system’s latest modernization project will be big. And it will eliminate a major rail system bottleneck that has been around for 100 years.

Dubbed the Red and Purple Modernization Program (RPM), the project involves a two-part procurement process.

The first step now beginning, is a Request for Qualifications (RFQ) to select a pool of qualified contracting teams to…