Spiral

{
  "id": "MLC-T-IND-005531",
  "term": "Spiral",
  "field": "Industrial and trades",
  "definition": "A type of transition curve used in railway track design to gradually change the curvature from a tangent (straight) section to a circular curve, or between curves of different radii. This curve allows for a smooth and continuous increase or decrease in superelevation (cant) and lateral acceleration. The length of a spiral curve is calculated based on design speed, curvature, and the rate of change of superelevation.",
  "subject": "Rail equipment",
  "translations": {
    "de": "Spirale",
    "es": "espiral",
    "fr": "spirale"
  },
  "url": "https://mlchart.com/terminology/industrial/spiral/"
}