The US Federal Aviation Administration has updated its guidance for how pilots will be advised when a runway is shortened, both temporarily and permanently.
The Automatic Terminal Information Service will broadcast a message that includes "warning" prior to the runway number and "shortened" after the number as well as the available length for the duration of that the length is adjusted, according to a briefing leaflet from the International Federation of Airline Pilots' Associations.
Air Traffic Control (ATC) will also say "shortened" both immediately after the runway number in its line-up-and-wait, take-off and landing clearances to pilots.
In addition, ATC will use the warning and shortened advisories for either 30 days after a runway is permanently shortened or until the airport directory has been updated, whichever is longer.
The updated guidance follows four incidences where planes landed in closed construction areas on runway 32L at Chicago O'Hare International Airport, which has been shortened due to construction.