In 1998, the National Highway Traffic Safety Administration (NHTSA) and the Governors Highway Safety Association (GHSA) developed the Model Minimum Uniform Crash Criteria (MMUCC), a voluntary guideline to encourage greater crash data uniformity by identifying a minimum set of motor vehicle crash data elements and attributes that States should collect and include in their State crash data system. NHTSA relies on State crash data for the Fatality Analysis Reporting System (FARS). FARS is a nationwide census providing NHTSA, Congress, and the American public yearly data regarding fatal injuries suffered in motor vehicle traffic crashes. States have implemented MMUCC differently, often combining or deleting attributes, which causes problems with data uniformity when attempting to aggregate data across States. The purpose of this paper is to describe methods used to measure States' alignment to MMUCC 5th Edition, examine the variance of States' crash data to MMUCC data elements, and describe how NHTSA will use the results of this analysis to inform future editions of MMUCC with the goal of improving the quality of FARS data.
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