Wisconsin DT4000 Crash Data User Guide

This document is a user guide for the Wisconsin DT4000 crash data system, which provides comprehensive crash summary data files to the Wisconsin Department of Transportation (WisDOT). The guide outlines the crash database's coverage, which includes all police-reported crashes in Wisconsin from 1994 onwards, detailing the location, vehicles involved, and general crash attributes while ensuring that personally identifiable information (PII) is removed. The document defines what constitutes a reportable crash and notes that not all reportable crashes are included in the database due to the requirement of a police report. It also describes the transition from the MV4000 to the DT4000 crash report format as of January 1, 2017, highlighting significant changes and adherence to the US DOT Model Minimum Uniform Crash Criteria (MMUCC) standard. Additionally, it provides detailed descriptions of various data elements and attributes available in the crash database, including conventions for interpreting the data. The guide concludes with contact information for inquiries and additional resources related to crash data analysis.