Transportation Secretary Sean Duffy said the US Federal Aviation Administration will release a plan today to reduce flights at Newark airport after systems outages and a staffing crunch pushed the agency to slow traffic over the last several weeks.

The FAA said it is reducing flight operations at Newark Airport due to equipment outages, staffing shortages and runway construction in order to alleviate delays and congestion.

According to the New York Post, a blackout on April 28 for air traffic controllers overseeing Newark led to many workers taking trauma leave, exacerbating its staff shortage. In addition, a Newark Airport runway is closed for “rehabilitation work” leaving the airport with only one functioning runway.