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    "story_id": "mp-2026-07-17-016",
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    "headline": "The Speed Limit Costs Less Than a Minute",
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    "dek": "A model of 120 million U.S. trips estimates large daily fuel savings with little average travel-time change.",
    "summary": "A model of 120 million U.S. trips estimates large daily fuel savings with little average travel-time change.",
    "body_text": "Minnesota researchers estimate 6.7 million gallons and 57,000 metric tons of carbon dioxide saved per day. It is a model from real trips, not an enforcement trial.",
    "why_it_matters": "A model of 120 million U.S. trips estimates large daily fuel savings with little average travel-time change.",
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        "qualification": "It is a model from real trips, not an enforcement trial."
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    "tags": [
      "speed limits",
      "fuel",
      "transportation"
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  "sources": [
    {
      "source_id": "source-2026-07-17-018",
      "title": "Minnesota via Newswise: Driving the speed limit",
      "publisher": "Minnesota via Newswise",
      "url": "https://www.newswise.com/articles/driving-the-speed-limit-cuts-millions-in-fuel-costs-for-less-than-a-minute-of-your-time",
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      "published_at": "2026-07-16T11:00:00.000-04:00",
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    "title": "The Speed Limit Costs Less Than a Minute",
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