{
  "dataset": "Waymo S2 vintage progression",
  "source": "Waymo self-published safety benchmark data",
  "phase": "deployment",
  "latest_vintage": "202606",
  "vintages": [
    {
      "vintage_end": "202407",
      "vintage_start": "202009",
      "cell_count": 945,
      "cumulative_miles": 25280185.5,
      "incremental_miles_vs_prior_release": 25280185.5,
      "negative_revision_cells": 0,
      "states": [
        {
          "state": "Unspecified",
          "cumulative_miles": 25280185.5,
          "cell_count": 945
        }
      ]
    },
    {
      "vintage_end": "202409",
      "vintage_start": "202009",
      "cell_count": 964,
      "cumulative_miles": 32979452.3,
      "incremental_miles_vs_prior_release": 7699266.8,
      "negative_revision_cells": 0,
      "states": [
        {
          "state": "Unspecified",
          "cumulative_miles": 32979452.3,
          "cell_count": 964
        }
      ]
    },
    {
      "vintage_end": "202412",
      "vintage_start": "202009",
      "cell_count": 987,
      "cumulative_miles": 49448610.0,
      "incremental_miles_vs_prior_release": 16472834.0,
      "negative_revision_cells": 0,
      "states": [
        {
          "state": "Unspecified",
          "cumulative_miles": 49448610.0,
          "cell_count": 987
        }
      ]
    },
    {
      "vintage_end": "202503",
      "vintage_start": "202009",
      "cell_count": 1090,
      "cumulative_miles": 71432301.3,
      "incremental_miles_vs_prior_release": 21983903.5,
      "negative_revision_cells": 0,
      "states": [
        {
          "state": "Unspecified",
          "cumulative_miles": 71432301.3,
          "cell_count": 1090
        }
      ]
    },
    {
      "vintage_end": "202506",
      "vintage_start": "202009",
      "cell_count": 1148,
      "cumulative_miles": 95965170.8,
      "incremental_miles_vs_prior_release": 24533923.2,
      "negative_revision_cells": 0,
      "states": [
        {
          "state": "Unspecified",
          "cumulative_miles": 95965170.8,
          "cell_count": 1148
        }
      ]
    },
    {
      "vintage_end": "202509",
      "vintage_start": "202009",
      "cell_count": 1272,
      "cumulative_miles": 127157594.3,
      "incremental_miles_vs_prior_release": 31191507.4,
      "negative_revision_cells": 0,
      "states": [
        {
          "state": "Unspecified",
          "cumulative_miles": 127157594.3,
          "cell_count": 1272
        }
      ]
    },
    {
      "vintage_end": "202512",
      "vintage_start": "202009",
      "cell_count": 1842,
      "cumulative_miles": 170712345.1,
      "incremental_miles_vs_prior_release": 43574210.4,
      "negative_revision_cells": 15,
      "states": [
        {
          "state": "California",
          "cumulative_miles": 91377181.8,
          "cell_count": 933
        },
        {
          "state": "Arizona",
          "cumulative_miles": 68613293.0,
          "cell_count": 622
        },
        {
          "state": "Texas",
          "cumulative_miles": 10721870.3,
          "cell_count": 287
        }
      ]
    },
    {
      "vintage_end": "202603",
      "vintage_start": "202009",
      "cell_count": 2079,
      "cumulative_miles": 218821152.7,
      "incremental_miles_vs_prior_release": 48049807.8,
      "negative_revision_cells": 14,
      "states": [
        {
          "state": "California",
          "cumulative_miles": 118893629.0,
          "cell_count": 992
        },
        {
          "state": "Arizona",
          "cumulative_miles": 80551000.5,
          "cell_count": 622
        },
        {
          "state": "Texas",
          "cumulative_miles": 15788782.8,
          "cell_count": 289
        },
        {
          "state": "Georgia",
          "cumulative_miles": 3587740.4,
          "cell_count": 176
        }
      ]
    },
    {
      "vintage_end": "202606",
      "vintage_start": "202009",
      "cell_count": 2209,
      "cumulative_miles": 268488633.8,
      "incremental_miles_vs_prior_release": 49667481.1,
      "negative_revision_cells": 11,
      "states": [
        {
          "state": "California",
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          "cell_count": 1102
        },
        {
          "state": "Arizona",
          "cumulative_miles": 92121323.8,
          "cell_count": 615
        },
        {
          "state": "Texas",
          "cumulative_miles": 21064489.3,
          "cell_count": 268
        },
        {
          "state": "Georgia",
          "cumulative_miles": 5783708.0,
          "cell_count": 224
        }
      ]
    }
  ]
}