Highball

{
  "id": "MLC-T-IND-002833",
  "term": "Highball",
  "field": "Industrial and trades",
  "definition": "A hand signal used in rail operations, traditionally made by a raised arm, indicating that a train is cleared to proceed at maximum authorized speed. This signal communicates an unrestricted movement authority to the locomotive engineer. The term originates from early railway signaling where a ball raised high on a mast indicated a clear track.",
  "subject": "Rail equipment",
  "translations": {
    "de": "Highball",
    "es": "vía libre",
    "fr": "voie libre"
  },
  "url": "https://mlchart.com/terminology/industrial/highball/"
}