{
  "schemaVersion": 1,
  "snapshotDate": "2026-08-06",
  "generatedFor": "speedcameramap.uk",
  "sources": [
    {
      "name": "OpenStreetMap",
      "url": "https://www.openstreetmap.org/copyright",
      "licence": "ODbL 1.0",
      "use": "Speed-camera coordinates and source fields"
    },
    {
      "name": "Department for Transport road traffic statistics",
      "url": "https://roadtraffic.dft.gov.uk/downloads",
      "licence": "Open Government Licence",
      "use": "AADF count-point data; years vary by record through 2024"
    },
    {
      "name": "Department for Transport STATS19",
      "url": "https://www.gov.uk/government/statistical-data-sets/road-safety-open-data",
      "licence": "Open Government Licence",
      "use": "Final 2024 police-reported personal-injury collisions"
    }
  ],
  "matching": {
    "traffic": "Nearest matched DfT count point; source year retained per record",
    "collisions": "Within 500 metres; aggregate collision identifiers deduplicated"
  },
  "files": [
    {
      "file": "cameras-all.json",
      "bytes": 1738880,
      "sha256": "e1fef73e5ba400fd69a8b8eb8a28859871afed24c8002a438f7ad17f938ad57b"
    },
    {
      "file": "city-index.json",
      "bytes": 120600,
      "sha256": "34bec562bbe4efdc75259137adcffad14189af73cbfc7ea0941ed2c13ac08076"
    },
    {
      "file": "road-index.json",
      "bytes": 286819,
      "sha256": "c11e7ae876f1c4f19ee82bedcd44bb925be7b07a21202b59b2869a421e124ef7"
    },
    {
      "file": "county-index.json",
      "bytes": 38211,
      "sha256": "c0aebb4c763b30274a5b18a261e54420d027a2484f99d03b94223c30ec88283d"
    },
    {
      "file": "camera-traffic.json",
      "bytes": 606358,
      "sha256": "54109e9265276ce36235b63064a306171e67925fc3ed16261e2ad32bb9b36283"
    },
    {
      "file": "camera-crashes.json",
      "bytes": 315304,
      "sha256": "ddadececfdf30b784aafa93e0d98dab0bfdca288c12e88f3f42103ecfc2ce9b7"
    },
    {
      "file": "city-crashes.json",
      "bytes": 18155,
      "sha256": "3b11d3e4948ed2f05dc4db90090595feb8cd4df29be551b3ed8d3c82a3d7a553"
    },
    {
      "file": "county-crashes.json",
      "bytes": 8393,
      "sha256": "8a2a302d341c07173dc672bfc6fe016b40a1a70def35584c61bbf49e130f210e"
    },
    {
      "file": "road-crashes.json",
      "bytes": 67321,
      "sha256": "be36842c945fe87bd249ff4b3594073776e9086fb4b6fa1484f3f7f8f6ccd042"
    },
    {
      "file": "national-crashes.json",
      "bytes": 97,
      "sha256": "5aa86daf1b7b56b0ff68f4a187a8ed62adff5f9ce5a82ff3e30044ef2b4b9d28"
    }
  ]
}
