About Crosswalk

Every state in the country reports its own traffic crash data, but not always in a way that lines up with every other state's. The federal government publishes a national standard for what a crash report should capture - MMUCC (the Model Minimum Uniform Crash Criteria) - but most states' own crash-reporting systems were built years apart, by different vendors, on different timelines, and don't fully match it. Some elements are missing entirely. Others use a different numbering scheme for the same thing - one state's code for "clear weather" might be another state's code for "rain."

That inconsistency makes it hard to compare crash data across state lines, and hard for national safety programs to use it well.

What Crosswalk does

Crosswalk gives a state a way to map the crash data it already collects onto the national standard, without changing anything about how officers file a report in the field. A state's own field names and codes get matched, once, to the standard's equivalent - and from then on, that state's crash data can be checked and exported in the standard format automatically.

What you're looking at

This site is a working demo, not a finished product. It runs real (de-identified) public crash data from five states - Nebraska, Iowa, Illinois, Washington DC, and Kansas - through the actual mapping and checking process:

• State Mappings - see how each state's own fields translate to the national standard.
• Validate - see that state's mapped data checked against the government's own real cross-field consistency rules.

Everything you see here is real, verifiable output, not a mockup - but it's still an early prototype, and the states shown are examples used to prove the mechanism works, not a finished 50-state rollout.

Curious how it's actually built? →

Crosswalk is a product of Bad Marine LLC.