Open dataset · CC BY 4.0
The national DUI law dataset
US impaired-driving law as structured data rather than prose: offence statutes, penalty matrices, and the administrative licence deadlines that expire while people are still waiting for a court date. Every value arrives with its citation, its official source, and the date an attorney checked it.
2 of 51 jurisdictions are verified and publishing. The rest are mapped — sources identified, nothing published. We would rather cover fewer states correctly than all of them approximately.
Use it
JSON — index
GET /api/corpusEvery jurisdiction, its coverage status, its licensing agency and its core offence citation. Start here to see what exists before requesting a state.
JSON — one jurisdiction
GET /api/corpus/{state}Statutes, penalty matrix by offence class and prior count, administrative licence rules, and case law — each row with its own citation and verification date.
MCP server
https://duiinfo.net/api/mcpAdd as a remote MCP server in any compatible AI client. Read-only, no key. DUI questions then resolve against verified rows instead of recalled training data.
Why this is published openly
DUI law is high-stakes, changes constantly, and is published by fifty-one different governments in fifty-one different formats — about a quarter of which refuse to serve an automated request at all. The result is that most of what circulates about DUI penalties online is a copy of a copy, with no date on it. Language models inherit exactly that problem, and answer confidently from figures that may have been amended years ago.
A cleaned, cited, dated version of this data is more useful to everyone than a private one would be to us. Attribution is the only condition.
Licence and citation
Creative Commons Attribution 4.0. Reuse it, including commercially, with credit. Suggested form: DUIINFO.NET, National DUI Law Corpus, https://duiinfo.net/data, accessed [date]. When you quote a specific figure, carry its verification date with it — a DUI number without a date is not a fact, it is a rumour with a source.
Method: how we verify. Errors: corrections. Standards and funding: editorial policy.
General legal information, not legal advice. DUIINFO LLC is not a law firm.