{
  "corridors": [
    {
      "band": "CLEAR",
      "confidence": "HIGH",
      "drivers": [
        "No closures or restrictions shown on the corridor read — QEII open",
        "Mostly dry, ice in places; Highway 2 corridor: lowest minus 13 degrees, winds to 13 km/h",
        "No Environment Canada warnings in force as of 5:11 AM MDT (EC check via Weather Navigation)",
        "Tonight's EC forecast low minus 7 degrees at Edmonton, minus 6 at Calgary — corridor low recorded as the colder endpoint, minus 7; Calgary overnight wind chill minus 10 (+8)",
        "Calgary 30 percent chance of flurries this morning with risk of freezing drizzle — no stated snow amount, no snow scoring threshold met"
      ],
      "id": "qeii",
      "low_c": -7,
      "low_source": "Environment Canada",
      "name": "QEII — Calgary ↔ Edmonton",
      "score": 8,
      "sources": [
        "Environment Canada",
        "511 Alberta (via Weather Navigation)"
      ]
    },
    {
      "band": "CLEAR",
      "confidence": "HIGH",
      "drivers": [
        "No closures or restrictions shown on the corridor read — Yellowhead open",
        "Mostly dry, ice in places; Highway 16 corridor: lowest minus 13 degrees, winds to 13 km/h",
        "No Environment Canada warnings in force as of 5:11 AM MDT (EC check via Weather Navigation)",
        "Tonight at Jasper: low minus 10 degrees, wind chill minus 13 overnight (+8)",
        "Jasper 5:00 a.m. read minus 11.1 degrees, wind chill minus 15 this morning — the coldest dawn on the corridors"
      ],
      "id": "yellowhead",
      "low_c": -10,
      "low_source": "Environment Canada",
      "name": "Yellowhead — Edmonton ↔ Jasper",
      "score": 8,
      "sources": [
        "Environment Canada",
        "511 Alberta (via Weather Navigation)"
      ]
    },
    {
      "band": "CAUTION",
      "confidence": "HIGH",
      "drivers": [
        "Open to through traffic overnight — checked 4:00 AM PDT, no incidents reported",
        "Partial closure / major restriction: 3 work zones in effect until Oct 31 (+40)",
        "M+S or 3-peak-mountain-snowflake tires required Oct 1 to Apr 30 (standing rule, not a chain-up requirement, not scored)",
        "No Environment Canada alerts shown for Merritt; Friday night EC Merritt forecast: rain showers changing to flurries, local snowfall 2 cm, low minus 3 degrees — below the 5 cm scoring threshold",
        "Winter driving conditions reported on the Coquihalla summit — carry winter tires and allow extra time"
      ],
      "id": "coquihalla",
      "low_c": -3,
      "low_source": "Environment Canada",
      "name": "Coquihalla — Hope ↔ Kamloops",
      "score": 40,
      "sources": [
        "DriveBC (via Is The Coquihalla Open)",
        "Environment Canada"
      ]
    },
    {
      "band": "CLEAR",
      "confidence": "LIMITED",
      "drivers": [
        "No major incident or full closure on any of Toronto's 9 major highways as of 7:19 AM EDT — yesterday's Markham Road express closure is cleared",
        "One lane-level 401 item: continuous construction eastbound express at McCowan Road, Toronto, 1 right lane, moderate, since Oct 26 — not a mainline closure (not scored)",
        "EC Toronto-area: no alerts shown; tonight partly cloudy, fog patches overnight, low plus 1 degree — no scoring threshold met",
        "Toronto Pearson 7:00 a.m. read 9.1 degrees, northwest wind 27 gusting to 37 km/h — gusty, not a scoring input"
      ],
      "id": "on-401",
      "low_c": 1,
      "low_source": "Environment Canada",
      "name": "ON 401 — Windsor ↔ Toronto ↔ Kingston",
      "score": 0,
      "sources": [
        "routeoutlook.com (live traffic aggregator, presenting Ontario 511 data)",
        "Environment Canada"
      ]
    }
  ],
  "scored_at": "2026-10-30T05:30:00-06:00"
}