2001 Michigan Traffic Crash Facts

NHTSA · 2002 · ROSA P / Michigan. Office of Highway Safety Planning

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Summary

This document, titled *2001 Michigan Traffic Crash Facts*, serves as a comprehensive statistical report summarizing traffic crash data for Michigan roadways during the calendar year 2001. Produced by the Michigan Department of State Police and the University of Michigan Transportation Research Institute, the report aims to provide accurate data to support highway safety planning and injury reduction efforts funded by the National Highway Traffic Safety Administration. The publication addresses the need for reliable traffic safety metrics while highlighting specific data quality issues, including processing errors that misidentified approximately 1,600 pedestrians and bicyclists as drivers, and inaccuracies in ignition interlock data that render those specific variables unsuitable for analysis. The data was compiled from Michigan Traffic Crash Report Forms (UD-10) submitted by local police, sheriff jurisdictions, and the State Police, supplemented by information from the Departments of Transportation, State, and Community Health. The report defines key metrics such as vehicle miles traveled (VMT), bodily alcohol content (BAC), and injury severity scales. It notes a methodological shift beginning in 2000, where alcohol-related crash data excludes drug-related incidents, preventing direct comparison with prior years. The analysis covers statewide trends, demographic breakdowns by age and gender, vehicle types, and specific crash circumstances such as red-light running, heavy truck involvement, and deer collisions. In 2001, Michigan recorded 1,328 traffic fatalities, a 3.9 percent decrease from 2000, and 112,294 injuries, down 7.8 percent. Total reported crashes fell 5.7 percent to 400,813. Despite increases in exposure factors—vehicle registrations rose 0.4 percent to 8.60 million, licensed drivers increased 0.7 percent to 7.09 million, and vehicle travel mileage grew 1.6 percent to 96.43 billion—the death rate dropped to 1.4 per 100 million miles of travel, a 6.7 percent decline from the previous year. Alcohol remained a significant factor in serious crashes; while only 3.9 percent of all crashes involved drinking, 34.7 percent of fatal crashes and 43.7 percent of alcohol-related crashes resulted in injury or death. Over 67.8 percent of alcohol-related fatal crashes involved single vehicles. The report concludes that while overall safety metrics improved, alcohol consumption continues to drive severe outcomes, and ongoing efforts are required to enhance data collection accuracy and timeliness.

Key finding

Michigan traffic fatalities decreased 3.9 percent to 1,328 in 2001, resulting in a death rate of 1.4 per 100 million miles of travel.

Methodology

dataset

Sample size: 400813

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StageOutcomeToolModelPromptAttemptsCompleted
discover success rosap 2 2026-05-23
archive success 1 2026-05-23
extract success cached 2 2026-06-10
clean success 1 2026-06-01
chunk success 1 2026-06-01
embed success 1 2026-06-02
enrich success 1 2026-05-23
promote success 1 2026-05-23
summarize success llm qwen3.6-27b-prismaquant summ-v5 3 2026-06-10
tag success vector_similarity 19 2026-06-11
verify success 2 2026-06-10

Summary generated by qwen3.6-27b-prismaquant on 2026-06-10; verification: verified.

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