{
  "traffic_unit": "Estimated annual average daily vehicles, all directions represented by each state-highway section.",
  "scope": "Reference-city intersections with archived sections; not all local streets or distinct travelers.",
  "year_policy": "Record ReportingYear independently matches every archive filename. The 2024 archive has stale 2023 metadata; use the matching 2023 archive for the 2023 map, and retain the 2024 metadata conflict in the audit.",
  "current_service_exclusion": "The live current service returned ReportingYear 2025 while its description said 2023; it supplies no study measurements.",
  "pair_policy": "Mainline only; exact route, related-route qualifiers and begin/end accumulated mile; duplicate keys excluded; projected Hausdorff distance <=5m; both AADT values >0. Median is unweighted across retained sections, not citywide traffic growth.",
  "spatial_reference": "2024 cached Census cartographic place geometry, projected EPSG:32610 for clipping and geometry checks. No crash cohort reassignment.",
  "sum_policy": "AADT is not summed across road sections: the same trip can traverse multiple sections. No total visitors, through travelers, citywide VMT or crash risk is inferred.",
  "archives": [
    {
      "file": "wsdot-traffic-sections-2020.zip",
      "url": "https://data.wsdot.wa.gov/geospatial/DOT_TDO/TrafficGeoportal/2020_TrafficSections.zip",
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      "retrieved_at": "2026-10-20T17:48:38.161408+00:00",
      "record_years": [
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      ],
      "statewide_features": 4892,
      "layer": "TrafficSections2020"
    },
    {
      "file": "wsdot-traffic-sections-2021.zip",
      "url": "https://data.wsdot.wa.gov/geospatial/DOT_TDO/TrafficGeoportal/2021_TrafficSections.zip",
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      "record_years": [
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      ],
      "statewide_features": 4871,
      "layer": "TrafficSections2021"
    },
    {
      "file": "wsdot-traffic-sections-2022.zip",
      "url": "https://data.wsdot.wa.gov/geospatial/DOT_TDO/TrafficGeoportal/2022_TrafficSections.zip",
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      "retrieved_at": "2026-10-20T17:48:39.660123+00:00",
      "record_years": [
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      ],
      "statewide_features": 4879,
      "layer": "TrafficSections2022"
    },
    {
      "file": "wsdot-traffic-sections-2023.zip",
      "url": "https://data.wsdot.wa.gov/geospatial/DOT_TDO/TrafficGeoportal/2023_TrafficSections.zip",
      "sha256": "1cb70a2217de560cb67b57c7c77b2d0c06424711d50bcc010bea8fcb3840e798",
      "bytes": 1433501,
      "retrieved_at": "2026-10-20T17:48:40.304762+00:00",
      "record_years": [
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      ],
      "statewide_features": 4865,
      "layer": "TrafficSections2023"
    },
    {
      "file": "wsdot-traffic-sections-2024.zip",
      "url": "https://data.wsdot.wa.gov/geospatial/DOT_TDO/TrafficGeoportal/2024_TrafficSections.zip",
      "sha256": "11118e10299bdbbb84f4108951b7157d47ad58be77154746393d7f7c76c85311",
      "bytes": 1422359,
      "retrieved_at": "2026-10-20T17:48:41.029129+00:00",
      "record_years": [
        2024
      ],
      "statewide_features": 4810,
      "layer": "TrafficSections2024"
    }
  ],
  "reference_boundary_receipt": {
    "url": "https://www2.census.gov/geo/tiger/GENZ2024/shp/cb_2024_53_place_500k.zip",
    "sha256": "ddde7993b65279fefecf3c6b9dacdf13fb0273c5ec56584743d1721b969ad0fb",
    "bytes": 459257,
    "retrieved_at": "2026-10-20T17:26:23.649040+00:00"
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  "runtime": {
    "pyogrio": "0.13.0",
    "gdal": "3.12.4"
  }
}