Live Demo · Real State Data
Map any state's crash data schema onto MMUCC6, validated against 130 of the 131 edit rules.
Every state runs its own crash-reporting system, built years apart, by different vendors, on different timelines — so the same real-world crash ends up recorded in incompatible ways from state to state. Crosswalk maps a state's own crash, vehicle, and person fields onto the federal MMUCC6 standard, then validates the result — without changing anything about how an officer files a report in the field.
Configured today for four states and one jurisdiction — Illinois, Iowa, Kansas, Nebraska, and Washington, D.C. — each tracked across four mapping categories: crash fields, vehicle fields, person fields, and person-specific overrides. Nebraska's mapping is the most complete so far: 14 crash fields, 11 vehicle fields, 6 person fields, and 1 person override, all reviewable in the tool.
A mapping is only as good as what it's checked against. Crosswalk runs 130 of the 131 MMUCC6 edit rules against real mapped sample data — currently 65 real, de-identified Nebraska crash records — and surfaces every violation individually: which crash, which rule, and how severe.
Nothing passes through silently. Each violation goes through a human-decision step with four explicit options — allow it as-is, fix the source value, exclude the record, or delete the value — and that decision is saved rather than assumed.
Beyond reviewing existing mappings, the tool takes proposals for new ones. An AI-assist feature is built in to help draft a proposal, though it's disabled on this particular deployment — it degrades gracefully to an "unavailable" message rather than breaking anything.
The mapping and validation engine is built and tested: 130 of the 131 MMUCC6 edit rules, real de-identified crash data from four states and one jurisdiction, and exports checked against NHTSA's own MMUCC6 schema. The online demo runs the review-and-validate workflow above on that sample data. One thing is left untested on purpose: personal information. The personal fields are mapped like every other field, but Crosswalk is built and shown on de-identified records only — no real names, addresses, or licence numbers have been run through it, even where a state's own public files include them. What the demo doesn't do yet: build the final export package from the triage decisions made here — that step is built and on its way to the demo. If mapping your state's crash data onto MMUCC6 is a problem you have, get in touch.
