{
  "edition": "2026-10-20",
  "execution": "Local descriptive research with the TrendSights research approach, Codex, and human review; not a hosted TrendSights run or automatic product output.",
  "sourceResearchVerification": {
    "checkedAt": "2026-10-20T18:27:57.632327+00:00",
    "verified": true,
    "checks": {
      "frozen_years": 5,
      "city_months": 120,
      "city_quarters": 40,
      "street_severe_counts_verified": true,
      "event_timeline_crashes_verified": 1425,
      "event_timeline_date_and_clock_multiplicities_verified": true,
      "cover_context_GEOIDs_and_source_hashes_verified": true,
      "CRISP_DM_phases_with_existing_artifacts": 6,
      "intersection_delta": 57,
      "Seattle_traffic_pairs_2021_2023": 126,
      "Seattle_traffic_pairs_2023_2024": 37,
      "Bellevue_traffic_pairs_2023_2024": 3,
      "unique_Seattle_response_events": 1605377,
      "public_source_receipts_verified": 149,
      "federal_source_receipts_verified": 33,
      "three_city_crash_events_retained": 57785,
      "three_city_severe_events_retained": 1654,
      "King_tract_contexts_verified": 495,
      "LODES_official_content_checksums_verified": 5,
      "new_three_city_grid_events_verified": 751,
      "raw_identifiers_excluded_from_aggregate_tables": true,
      "cover_full_period_and_focused_increase_dates_verified": true
    }
  },
  "phases": [
    {
      "phase": "Business understanding",
      "purpose": "Question, geography, and periods",
      "artifacts": [
        "README.txt",
        "king-county-research-brief-enriched.pdf"
      ]
    },
    {
      "phase": "Data understanding",
      "purpose": "Source definitions and universes",
      "artifacts": [
        "data/federal/federal-state-local-feature-contract.json",
        "data/source-ledger.json",
        "data/federal/public-source-receipts.json"
      ]
    },
    {
      "phase": "Data preparation",
      "purpose": "Geographic and local-record joins",
      "artifacts": [
        "data/federal/federal-state-local-join-plan.json",
        "data/federal/crash-tract-join-audit.csv",
        "data/federal/lodes-join-audit.json"
      ]
    },
    {
      "phase": "Modeling",
      "purpose": "Descriptive maps, traffic pairs, and solar phases",
      "artifacts": [
        "figures/federal-resident-workplace-density.pdf",
        "figures/federal-modeled-solar-shares.pdf",
        "data/federal/state-highway-matched-section-pairs.csv"
      ]
    },
    {
      "phase": "Evaluation",
      "purpose": "Reconciliation, MOEs, missingness, and sensitivity",
      "artifacts": [
        "data/federal/federal-context-verification.json",
        "data/federal/acs-estimate-moe-annotations.csv",
        "data/federal/solar-threshold-sensitivity.csv"
      ]
    },
    {
      "phase": "Publication handoff",
      "purpose": "Reviewable evidence publications and aggregate derivatives",
      "artifacts": [
        "king-county-carousel-enriched.pdf",
        "king-county-research-brief-enriched.pdf",
        "municipal-evidence-atlas.pdf",
        "cloudraven-research-design-guide.pdf"
      ]
    }
  ],
  "iteration": "Return to scope, source selection, or preparation when evaluation reveals a gap.",
  "limits": "Descriptive counts and context. No causal effect, statistical significance, forecast, travel-adjusted risk, or patrol effectiveness established. ACS residents, LODES primary jobs, section traffic, modeled solar phase, and observed Seattle lighting have separate universes."
}