"grade-separated" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "grade-separated (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2020 January 2, Philip Haigh, “Is there relief to congestion along Castlefield Corridor?”, in Rail, page 23",
          "text": "Potential answers here include remodelling the north junction to be grade-separated, adding an extra platform and track to allow more parallel moves, or by changing services so that trains from Wigan go towards Piccadilly and trains from Bolton head for Victoria.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Having routes that meet cross each other on different levels, avoiding the conflicts that occur with a flat junction at only one level."
      ],
      "id": "en-grade-separated-en-adj-68QOWNto",
      "raw_glosses": [
        "(of a junction) Having routes that meet cross each other on different levels, avoiding the conflicts that occur with a flat junction at only one level."
      ],
      "raw_tags": [
        "of a junction"
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "grade-separated"
}

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "grade-separated (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English terms with quotations",
        "English uncomparable adjectives"
      ],
      "examples": [
        {
          "ref": "2020 January 2, Philip Haigh, “Is there relief to congestion along Castlefield Corridor?”, in Rail, page 23",
          "text": "Potential answers here include remodelling the north junction to be grade-separated, adding an extra platform and track to allow more parallel moves, or by changing services so that trains from Wigan go towards Piccadilly and trains from Bolton head for Victoria.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Having routes that meet cross each other on different levels, avoiding the conflicts that occur with a flat junction at only one level."
      ],
      "raw_glosses": [
        "(of a junction) Having routes that meet cross each other on different levels, avoiding the conflicts that occur with a flat junction at only one level."
      ],
      "raw_tags": [
        "of a junction"
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "grade-separated"
}