"Pittsburgh left" meaning in English

{
  "forms": [
    {
      "form": "Pittsburgh lefts",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Pittsburgh left (plural Pittsburgh lefts)",
      "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": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Transport",
          "orig": "en:Transport",
          "parents": [
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "The act of an automobile driver to immediately turn left on the onset of a green light, regardless of the driver's right of way."
      ],
      "id": "en-Pittsburgh_left-en-noun-BHcla0L3",
      "links": [
        [
          "transport",
          "transport"
        ],
        [
          "green light",
          "green light"
        ],
        [
          "right of way",
          "right of way"
        ]
      ],
      "raw_glosses": [
        "(US, transport) The act of an automobile driver to immediately turn left on the onset of a green light, regardless of the driver's right of way."
      ],
      "tags": [
        "US"
      ],
      "topics": [
        "transport"
      ]
    }
  ],
  "word": "Pittsburgh left"
}

{
  "forms": [
    {
      "form": "Pittsburgh lefts",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Pittsburgh left (plural Pittsburgh lefts)",
      "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",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Transport"
      ],
      "glosses": [
        "The act of an automobile driver to immediately turn left on the onset of a green light, regardless of the driver's right of way."
      ],
      "links": [
        [
          "transport",
          "transport"
        ],
        [
          "green light",
          "green light"
        ],
        [
          "right of way",
          "right of way"
        ]
      ],
      "raw_glosses": [
        "(US, transport) The act of an automobile driver to immediately turn left on the onset of a green light, regardless of the driver's right of way."
      ],
      "tags": [
        "US"
      ],
      "topics": [
        "transport"
      ]
    }
  ],
  "word": "Pittsburgh left"
}