Runway status lights (RWSL) system

{
  "id": "MLC-T-AVN-000857",
  "term": "Runway status lights (RWSL) system",
  "field": "Aviation and air traffic control",
  "definition": "The RWSL is a system of runway and taxiway lighting to provide pilots increased situational awareness by illuminating runway entry lights (REL) when the runway is unsafe for entry or crossing, and take-off hold lights (THL) when the runway is unsafe for departure.",
  "references": [
    "FAA Pilot/Controller Glossary"
  ],
  "url": "https://mlchart.com/terminology/aviation/runway-status-lights-rwsl-system/"
}