Capital Improvements in the Air Traffic Control System NextGen is a multiyear, incremental program planned to incorporate precision satellite navigation and surveillance, digital, networked-communications, and an integrated weather system. This complex undertaking involves acquiring new integrated air traffic control systems; developing new flight procedures, standards, and regulations; and creating and maintaining new supporting infrastructure. This transformation is designed to dramatically change the roles and responsibilities of both air traffic controllers and pilots and change the way they interact with their systems. The involvement of airlines and other aviation stakeholders is also essential, since full implementation of NextGen will require airlines and others to invest in new avionics and other technologies to take full advantage of NextGen benefits.