It will take $31.5 billion to build a brand-new air traffic control system for the country, Department of Transportation Secretary Sean Duffy told members of the House Wednesday, the first time the department has publicly put a dollar figure on the project.

U.S. Transportation Secretary Sean Duffy on Wednesday called on Congress to award another $19 billion to overhaul the aging U.S. air traffic control system after lawmakers approved an initial $12.5 billion over five years in funding.