The Chicago Transit Authority’s $2.1 billion Red and Purple Line Modernization Project (RPM) is rebuilding a 5.6-mile elevated rail rapid transit structure and four stations, ensuring structural integrity, expanding capacity, and improving ride quality along a corridor on the North Side of Chicago. Included in this six-year project is removal of a failing embankment and returning land to the community.Here to talk with us about this project is Grace Ohs, Chicago Transit Authority RPM vice president and project lead. Grace earned her BS in Civil Engineering from the University of Illinois.