The Critical Analysis Reporting Environment (CARE) software identifies traffic safety problems, evaluates countermeasures, finds hazardous sites, and provides investigative data. It is versatile and user friendly. Its data-mining feature allows traffic safety officials to use it even though they possess only a fundamental understanding of statistical theory, the software or the data set. 1. The user identifies a data subset of concern (alcohol use, speed, etc.) and creates a filter to define the corresponding subset of crash data. 2. The data mining module compares the filter subset against its data complements (or any other defined data subset) over all attributes. 3. The data mining module generates a comparison for all attributes in the database and arranges the output in the order of most significant attribute first. All statistically significant differences are indicated. Since the output is listed in "worst first" order, the user can quickly identify the most productive work area. Using the data mining feature, safety professionals can then "drill down" into the data to find trends and answers to safety questions.
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