"logging railroad" meaning in English

{
  "forms": [
    {
      "form": "logging railroads",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "logging railroad (plural logging railroads)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "American English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Forestry",
          "orig": "en:Forestry",
          "parents": [
            "Applied sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Rail transportation",
          "orig": "en:Rail transportation",
          "parents": [
            "Transport",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A railroad built for the purpose of transporting logs out of a forest."
      ],
      "id": "en-logging_railroad-en-noun-~wNI53K7",
      "links": [
        [
          "rail transport",
          "rail transport"
        ],
        [
          "forestry",
          "forestry"
        ],
        [
          "log",
          "log"
        ]
      ],
      "raw_glosses": [
        "(rail transport, forestry, US) A railroad built for the purpose of transporting logs out of a forest."
      ],
      "tags": [
        "US"
      ],
      "topics": [
        "business",
        "forestry",
        "rail-transport",
        "railways",
        "transport"
      ]
    }
  ],
  "word": "logging railroad"
}

{
  "forms": [
    {
      "form": "logging railroads",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "logging railroad (plural logging railroads)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "American English",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "en:Forestry",
        "en:Rail transportation"
      ],
      "glosses": [
        "A railroad built for the purpose of transporting logs out of a forest."
      ],
      "links": [
        [
          "rail transport",
          "rail transport"
        ],
        [
          "forestry",
          "forestry"
        ],
        [
          "log",
          "log"
        ]
      ],
      "raw_glosses": [
        "(rail transport, forestry, US) A railroad built for the purpose of transporting logs out of a forest."
      ],
      "tags": [
        "US"
      ],
      "topics": [
        "business",
        "forestry",
        "rail-transport",
        "railways",
        "transport"
      ]
    }
  ],
  "word": "logging railroad"
}