Transportation Secretary Sean Duffy unveiled a sweeping plan to replace decades-old infrastructure to boost safety, cut delays, and support future air travel in a move to modernize the United States’s air traffic control system.

The transportation secretary announced a far-reaching plan to drastically overhaul the current technology used by thousands of controllers responsible for guiding planes in and out of airports.

CEOs from major U.S. airlines have come together in support of a new plan aimed at modernizing air traffic control systems across the nation.