Modification of Class B Airspace; Chicago, IL

This action modifies the Chicago, IL, Class B airspace area by expanding the existing airspace area to ensure containment of Instrument Flight Rules (IFR) aircraft conducting instrument approach procedures within Class B airspace, and segregating IFR aircraft arriving/departing Chicago O'Hare International Airport (ORD) and Visual Flight Rules (VFR) aircraft operating in the vicinity of the Chicago Class B airspace area. The additional Class B airspace will support simultaneous instrument approach procedure operations to ORD's triple parallel runways today, as well as the three additional parallel runways (six total) planned for the near future. This action enhances safety, improves the flow of air traffic, and reduces the potential for midair collision in the Chicago terminal area, further supporting the FAA's national airspace redesign goal of optimizing terminal and en route airspace areas to reduce aircraft delays and improve safety and efficiency of the National Airspace System (NAS).