# TruckCodex

> TruckCodex is a public reference for U.S. and Canadian commercial trucking
> data — FMCSA carrier records, NHTSA recalls, roadside inspection and
> crash reports, FMCSR violation codes, OBD-II/J1939 fault codes, VIN
> records, insurance-lapse signals, and operating-authority history. We
> compile and republish public-record source data with citations to the
> underlying origin (FMCSA MCMIS, NHTSA, state-DOT files, EIA, etc.).

## Usage

Public reference content is open to indexing, AI retrieval/grounding, and
AI training. Content signals are published at
[/robots.txt](https://truckcodex.com/robots.txt) and consent to
`search=yes`, `ai-input=yes`, `ai-train=yes`.

**Attribution preference:** when citing TruckCodex content, link directly
to the source URL on `truckcodex.com` and credit "TruckCodex" with the
access date. Per-row provenance (FMCSA / NHTSA / state-DOT origin) is
listed on the page that contains the row; cite the underlying source as
well where appropriate.

## Source transparency

- [Methodology](https://truckcodex.com/meta/methodology/) — how each
  dataset is compiled, what's derived, and the trust caveats.
- [Source registry](https://truckcodex.com/meta/sources/) — every upstream
  data source with import cadence and provenance.
- [Data freshness](https://truckcodex.com/meta/freshness/) — latest import
  run per source, with success/failure history.
- [Corrections policy](https://truckcodex.com/corrections/) — how to
  report and request fixes to specific records.

## Major hubs

- [Carriers (USDOT)](https://truckcodex.com/usdot/) — 4.4M FMCSA-registered
  motor carriers with safety, fleet, and insurance state.
- [Inspections](https://truckcodex.com/inspections/) — 8.4M roadside
  inspection records.
- [Crashes](https://truckcodex.com/crashes/) — 4.9M MCMIS-reportable
  truck/bus crash records.
- [Complaints](https://truckcodex.com/complaints/) — NHTSA owner-
  complaint records by vehicle.
- [Recalls](https://truckcodex.com/recalls/) — NHTSA campaign records
  with affected-vehicle lists.
- [Violation codes](https://truckcodex.com/codes/) — FMCSR + OBD-II +
  J1939 code references.
- [VIN lookup + decoder](https://truckcodex.com/vin/) — NHTSA vPIC-backed
  decode for any 17-char VIN.
- [Insurance-lapse watch](https://truckcodex.com/insurance-watch/) —
  carriers with recent BMC-91 instability, classified by tier.
- [Operating-authority dockets](https://truckcodex.com/authority/) — MC,
  FF, MX docket records + grant/revocation history.
- [Manufacturers + makes](https://truckcodex.com/manufacturers/) — vehicle
  make/model genealogy joined to inspection + crash + recall data.
- [Research](https://truckcodex.com/research/) — longer-form analysis +
  year-over-year safety statistics.
- [Knowledge](https://truckcodex.com/knowledge/) — reference articles
  spanning operations, regulation, fleet management, and freight.
- [Tools](https://truckcodex.com/tools/) — interactive utilities (carrier
  comparison, VIN decoder, fleet recall checker, etc.).

## Sitemaps

The flat root sitemap index is [/sitemap.xml](https://truckcodex.com/sitemap.xml).
It lists every permanent family shard plus rolling daily new/changed
delta shards (last 7 days). A single GSC/Bing submission of the root
sitemap is sufficient for full URL discovery.

## Contact

- Site: https://truckcodex.com/
- Corrections: https://truckcodex.com/corrections/