The Chicago region is the world’s third busiest intermodal hub where six of the seven Class I freight railroads converge and where nearly a quarter of the nation’s rail shipments arrive or pass through. In 2003, the Chicago Region Environmental and Transportation Efficiency (CREATE) Program was initiated as a public private partnership to make Chicago’s rail network safer, more efficient, and better able to accommodate growth in freight and passenger traffic. The 75th Street Corridor Improvement Project (75th Street CIP) is the largest project in the CREATE Program. As part of a team, Patrick was selected to provide design services for two of the four projects, including the Forest Hill Flyover (P3) and 71st Street Grade Separation (GS19). This rail-over-rail flyover will eliminate conflict between thirty (30) Southwest Service Metra trains and thirty-five (35) freight trains operating on the Western Avenue Corridor (CSX). The rail-over-road grade separation at 71st Street will reduce neighborhood traffic delays and improve safety. Passing through two CSX intermodal facilities meant that rail, intermodal, and road traffic must be maintained throughout construction. Patrick was instrumental in developing the project staging and sequencing plan to ensure that the grade separation structures and retained embankment approaches could be safely and efficiently constructed, with neutral impact on rail operations. As part of this project Patrick provided railroad bridge design, track/civil design, constructability reviews, and cost estimating services.