All 20 airports slated to receive the FAA’s Runway Status Lights program are fully operational, says the agency. The RWSL is made up of lights embedded in the tarmac across runway crossings as well as at the departure hold zone; they illuminate when it’s unsafe for an aircraft to proceed.
This is a companion discussion topic for the original entry at https://www.avweb.com/aviation-news/faa-completes-runway-status-lights-rollout