"double-tracking" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "double track",
        "3": "-ing"
      },
      "expansion": "double track + -ing",
      "name": "af"
    }
  ],
  "etymology_text": "From double track + -ing.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "double-tracking (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Rail transportation",
          "orig": "en:Rail transportation",
          "parents": [
            "Transport",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "_dis": "54 46",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w+disamb"
        },
        {
          "_dis": "46 54",
          "kind": "other",
          "name": "English terms suffixed with -ing",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "ref": "2019 October, “A2I reopens after summer blockade”, in Modern Railways, page 22",
          "text": "The 15-week closure enabled completion of double-tracking between Dyce and Inverurie and upgrades to the signalling system between Aberdeen and Huntly. Over 10 miles of new rail has been laid and 19 bridges refurbished or replaced, with double-tracking covering a 16-mile stretch in total.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "The provision of double track, usually as a conversion from single track."
      ],
      "id": "en-double-tracking-en-noun-jFgiT7eB",
      "links": [
        [
          "rail transport",
          "rail transport"
        ],
        [
          "provision",
          "provision"
        ],
        [
          "double track",
          "double track#English"
        ],
        [
          "single",
          "single"
        ],
        [
          "track",
          "track"
        ]
      ],
      "raw_glosses": [
        "(rail transport) The provision of double track, usually as a conversion from single track."
      ],
      "related": [
        {
          "word": "double-track"
        },
        {
          "word": "doubling"
        }
      ],
      "synonyms": [
        {
          "word": "double tracking"
        }
      ],
      "tags": [
        "uncountable"
      ],
      "topics": [
        "rail-transport",
        "railways",
        "transport"
      ]
    }
  ],
  "word": "double-tracking"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "double track",
        "3": "-ing"
      },
      "expansion": "double track + -ing",
      "name": "af"
    }
  ],
  "etymology_text": "From double track + -ing.",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "verb form"
      },
      "expansion": "double-tracking",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "_dis": "54 46",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
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        },
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          "_dis": "46 54",
          "kind": "other",
          "name": "English terms suffixed with -ing",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "form_of": [
        {
          "word": "double-track"
        }
      ],
      "glosses": [
        "present participle and gerund of double-track"
      ],
      "id": "en-double-tracking-en-verb-a~S2Be1J",
      "links": [
        [
          "double-track",
          "double-track#English"
        ]
      ],
      "tags": [
        "form-of",
        "gerund",
        "participle",
        "present"
      ]
    }
  ],
  "word": "double-tracking"
}

{
  "categories": [
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English non-lemma forms",
    "English nouns",
    "English terms suffixed with -ing",
    "English uncountable nouns",
    "English verb forms"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "double track",
        "3": "-ing"
      },
      "expansion": "double track + -ing",
      "name": "af"
    }
  ],
  "etymology_text": "From double track + -ing.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "double-tracking (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "double-track"
    },
    {
      "word": "doubling"
    }
  ],
  "senses": [
    {
      "categories": [
        "English terms with quotations",
        "en:Rail transportation"
      ],
      "examples": [
        {
          "ref": "2019 October, “A2I reopens after summer blockade”, in Modern Railways, page 22",
          "text": "The 15-week closure enabled completion of double-tracking between Dyce and Inverurie and upgrades to the signalling system between Aberdeen and Huntly. Over 10 miles of new rail has been laid and 19 bridges refurbished or replaced, with double-tracking covering a 16-mile stretch in total.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "The provision of double track, usually as a conversion from single track."
      ],
      "links": [
        [
          "rail transport",
          "rail transport"
        ],
        [
          "provision",
          "provision"
        ],
        [
          "double track",
          "double track#English"
        ],
        [
          "single",
          "single"
        ],
        [
          "track",
          "track"
        ]
      ],
      "raw_glosses": [
        "(rail transport) The provision of double track, usually as a conversion from single track."
      ],
      "tags": [
        "uncountable"
      ],
      "topics": [
        "rail-transport",
        "railways",
        "transport"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "double tracking"
    }
  ],
  "word": "double-tracking"
}

{
  "categories": [
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English non-lemma forms",
    "English nouns",
    "English terms suffixed with -ing",
    "English uncountable nouns",
    "English verb forms"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "double track",
        "3": "-ing"
      },
      "expansion": "double track + -ing",
      "name": "af"
    }
  ],
  "etymology_text": "From double track + -ing.",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "verb form"
      },
      "expansion": "double-tracking",
      "name": "head"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "form_of": [
        {
          "word": "double-track"
        }
      ],
      "glosses": [
        "present participle and gerund of double-track"
      ],
      "links": [
        [
          "double-track",
          "double-track#English"
        ]
      ],
      "tags": [
        "form-of",
        "gerund",
        "participle",
        "present"
      ]
    }
  ],
  "word": "double-tracking"
}