The Federal Aviation Administration says helicopters will be permanently banned from flying near Washington, D.C.’s airport on the route where an airliner and an Army helicopter collided in midair.

U.S. Transportation Secretary Sean Duffy on Tuesday said the agency will make permanent restrictions to prevent helicopters from flying near Washington Reagan National Airport when two lesser-used runways are operational,

The closure of the helicopter route near the airport makes permanent the restrictions put in place after Jan. 29 midair collision.

On Friday, the Federal Aviation Administration (FAA) permanently banned helicopters from flying the same route near Ronald Reagan Washington National Airport (DCA) after a deadly midair collision in January.