{
  "scored_at": "2026-10-21T19:46:05-06:00",
  "backfill": true,
  "corridors": [
    {
      "id": "qeii",
      "name": "QEII — Calgary ↔ Edmonton",
      "score": 0,
      "band": "CLEAR",
      "drivers": [
        "No closures overnight",
        "Mostly dry, ice in places",
        "Coldest corridor reading -4°C near Red Deer"
      ],
      "confidence": "LIMITED",
      "sources": [
        "511 Alberta (via Weather Navigation)",
        "Environment Canada (via Palliser Post)"
      ],
      "low_c": -4,
      "low_source": "511 Alberta road report (via Weather Navigation)"
    },
    {
      "id": "yellowhead",
      "name": "Yellowhead — Edmonton ↔ Jasper",
      "score": 0,
      "band": "CLEAR",
      "drivers": [
        "No closures overnight",
        "Mostly dry, ice in places"
      ],
      "confidence": "LIMITED",
      "sources": [
        "511 Alberta (via Weather Navigation)",
        "Environment Canada (via Palliser Post)"
      ],
      "low_c": null
    },
    {
      "id": "coquihalla",
      "name": "Coquihalla — Hope ↔ Kamloops",
      "score": 0,
      "band": "CLEAR",
      "drivers": [
        "Open to through traffic all night",
        "Three work zones in effect through Oct 31 — sudden stops and lane shifts",
        "BC chain-carry season in force since Oct 1 (carry, not chain-up)"
      ],
      "confidence": "LIMITED",
      "sources": [
        "DriveBC Open511 (via Is The Coquihalla Open)",
        "DriveSmartBC"
      ],
      "low_c": null
    },
    {
      "id": "on-401",
      "name": "ON 401 — Windsor ↔ Toronto ↔ Kingston",
      "score": 0,
      "band": "CLEAR",
      "drivers": [
        "No closures reported",
        "Fog patches early — Hamilton and Niagara",
        "Patchy frost after overnight lows of 2 to 3°C"
      ],
      "confidence": "LIMITED",
      "sources": [
        "Environment Canada (via Canada News Beep)"
      ],
      "low_c": 2,
      "low_source": "Environment Canada (via Canada News Beep)"
    }
  ]
}