"crossing loop" meaning in English

{
  "forms": [
    {
      "form": "crossing loops",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "crossing loop (plural crossing loops)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Rail transportation",
          "orig": "en:Rail transportation",
          "parents": [
            "Transport",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1960 April, “Talking of Trains: C.T.C. for Central Wales”, in Trains Illustrated, page 194:",
          "text": "Some 60 miles of single line (with long and short crossing loops at suitable intervals) will be continuously track-circuited and colour light-signalled under the control of one signalbox at Llandrindod Wells, enabling 18 existing signalboxes to be closed.",
          "type": "quote"
        }
      ],
      "glosses": [
        "synonym of passing loop"
      ],
      "id": "en-crossing_loop-en-noun-oSXH-tVk",
      "links": [
        [
          "rail transport",
          "rail transport"
        ],
        [
          "passing loop",
          "passing loop#English"
        ]
      ],
      "raw_glosses": [
        "(rail transport) synonym of passing loop"
      ],
      "synonyms": [
        {
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "passing loop"
        }
      ],
      "topics": [
        "rail-transport",
        "railways",
        "transport"
      ],
      "wikipedia": [
        "Passing loop"
      ]
    }
  ],
  "word": "crossing loop"
}

{
  "forms": [
    {
      "form": "crossing loops",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "crossing loop (plural crossing loops)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Rail transportation"
      ],
      "examples": [
        {
          "ref": "1960 April, “Talking of Trains: C.T.C. for Central Wales”, in Trains Illustrated, page 194:",
          "text": "Some 60 miles of single line (with long and short crossing loops at suitable intervals) will be continuously track-circuited and colour light-signalled under the control of one signalbox at Llandrindod Wells, enabling 18 existing signalboxes to be closed.",
          "type": "quote"
        }
      ],
      "glosses": [
        "synonym of passing loop"
      ],
      "links": [
        [
          "rail transport",
          "rail transport"
        ],
        [
          "passing loop",
          "passing loop#English"
        ]
      ],
      "raw_glosses": [
        "(rail transport) synonym of passing loop"
      ],
      "synonyms": [
        {
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "passing loop"
        }
      ],
      "topics": [
        "rail-transport",
        "railways",
        "transport"
      ],
      "wikipedia": [
        "Passing loop"
      ]
    }
  ],
  "word": "crossing loop"
}