The U.S. Department of Transportation revealed new details Wednesday about its timeline to improve Newark Airport's air traffic control system.

The problems that disrupted flights at New Jersey’s largest airport this spring could be repeated anywhere across the country, so Transportation Secretary Sean Duffy is trying to sell Congress on his plan to overhaul the nation’s air traffic control system that will cost “tens of billions.

At one point, the FAA had targeted 77 total arrivals and departures at Newark each hour, but at the start of construction on April 15 they requested airlines cut that down to 70 total during the day and 62 during specific hours in the late afternoons and evenings.