{
  "purpose": "Identifies the exact FMCSA source extracts behind the Fleet Regulators FMCSA data studies. Raw files are not published here.",
  "studies": [
    "https://fleetregulators.com/research/texas-motor-carrier-safety-profile",
    "https://fleetregulators.com/research/most-common-hos-roadside-violations"
  ],
  "snapshot_note": "The SMS Input files are replaced monthly by FMCSA; re-downloading them later returns a newer run. Verifying these exact figures requires the archived extracts matching the checksums below.",
  "csv_sha256_note": "SHA-256 of the extract file as written by the download script (selected columns, portal row order).",
  "row_content_sha256_note": "SHA-256 over the downloaded rows in portal order, computed during download.",
  "extracts": [
    {
      "extract": "sms_inspection",
      "publisher": "Federal Motor Carrier Safety Administration (FMCSA), U.S. DOT open data portal",
      "dataset_name": "SMS Input - Inspection",
      "dataset_id": "rbkj-cgst",
      "dataset_url": "https://data.transportation.gov/d/rbkj-cgst",
      "portal_rows_updated_at": "2026-10-13T08:22:41+00:00",
      "retrieved_at": "2026-11-07T02:12:47+00:00",
      "columns": [
        "unique_id",
        "dot_number",
        "insp_date",
        "report_state",
        "insp_level_id",
        "driver_oos_total",
        "vehicle_oos_total",
        "oos_total",
        "unsafe_insp",
        "fatigued_insp",
        "dr_fitness_insp",
        "subt_alcohol_insp",
        "vh_maint_insp",
        "hm_insp",
        "basic_viol",
        "unsafe_viol",
        "fatigued_viol",
        "dr_fitness_viol",
        "subt_alcohol_viol",
        "vh_maint_viol",
        "hm_viol"
      ],
      "filter": null,
      "row_count": 5853762,
      "csv_bytes": 455845692,
      "csv_sha256": "cbee3324c5a9a72fb6e80249681b53bbbe01ff991050b45df3f5cc1488445374",
      "row_content_sha256": "39ae1dffcd0b5852cc6dc403dc5d217fb555e181b829671c48667191033a6c3b"
    },
    {
      "extract": "sms_violation",
      "publisher": "Federal Motor Carrier Safety Administration (FMCSA), U.S. DOT open data portal",
      "dataset_name": "SMS Input - Violation",
      "dataset_id": "8mt8-2mdr",
      "dataset_url": "https://data.transportation.gov/d/8mt8-2mdr",
      "portal_rows_updated_at": "2026-10-13T07:31:00+00:00",
      "retrieved_at": "2026-11-07T02:21:07+00:00",
      "columns": [
        "unique_id",
        "dot_number",
        "insp_date",
        "viol_code",
        "basic_desc",
        "oos_indicator",
        "severity_weight",
        "section_desc",
        "group_desc",
        "viol_unit"
      ],
      "filter": null,
      "row_count": 6784490,
      "csv_bytes": 1075289309,
      "csv_sha256": "d9482b99b8d5703689eefb1321d5512cf9d83ab45bfed9febae82d7ffad16b07",
      "row_content_sha256": "5aba98c8672d10a363378667fe4d25708667dd553aaafe249d05749c80267165"
    },
    {
      "extract": "sms_census",
      "publisher": "Federal Motor Carrier Safety Administration (FMCSA), U.S. DOT open data portal",
      "dataset_name": "SMS Input - Motor Carrier Census Information",
      "dataset_id": "kjg3-diqy",
      "dataset_url": "https://data.transportation.gov/d/kjg3-diqy",
      "portal_rows_updated_at": "2026-10-13T08:31:57+00:00",
      "retrieved_at": "2026-11-07T02:22:55+00:00",
      "columns": [
        "dot_number",
        "carrier_operation",
        "phy_state",
        "phy_zip",
        "nbr_power_unit",
        "driver_total",
        "authorized_for_hire",
        "exempt_for_hire",
        "private_property",
        "hm_flag",
        "pc_flag",
        "add_date"
      ],
      "filter": null,
      "row_count": 2132868,
      "csv_bytes": 136748029,
      "csv_sha256": "a32667bc6d33a5965edf8be1b7e8cd24c580d8c7c18262eeac0275da870efae1",
      "row_content_sha256": "c6a5c682232caf474f22a1242aaba189692fac26ac9af47943cf14273eb14000"
    },
    {
      "extract": "company_census_tx",
      "publisher": "Federal Motor Carrier Safety Administration (FMCSA), U.S. DOT open data portal",
      "dataset_name": "Company Census File",
      "dataset_id": "az4n-8mr2",
      "dataset_url": "https://data.transportation.gov/d/az4n-8mr2",
      "portal_rows_updated_at": "2026-11-06T19:23:25+00:00",
      "retrieved_at": "2026-11-07T02:23:05+00:00",
      "columns": [
        "dot_number",
        "status_code",
        "carrier_operation",
        "phy_state",
        "phy_cnty",
        "phy_city",
        "phy_zip",
        "power_units",
        "carship",
        "classdef"
      ],
      "filter": "phy_state = 'TX'",
      "row_count": 379302,
      "csv_bytes": 22926326,
      "csv_sha256": "7fdd8b5ac8bdfee710c264529d29bc8012c7ebb4d52c18e7edb88162d0516466",
      "row_content_sha256": "a92e67941901d8418f9d35b08793c56f8461947f302fd7a3c24083fcc84bde5d"
    }
  ]
}