2005 Michigan Traffic Crash Facts

NHTSA · 2006 · ROSA P / Michigan. Office of Highway Safety Planning

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Summary

This report, titled *2005 Michigan Traffic Crash Facts*, presents a comprehensive statistical analysis of traffic crashes in Michigan for the calendar year 2005. Produced by the University of Michigan Transportation Research Institute using data from the Michigan Department of State Police, the document aims to provide accurate, timely information to support highway safety planning and injury reduction efforts. The study is motivated by the state’s commitment to saving lives and reducing injuries through data-driven leadership and program support. The methodology relies on data collected from 2005 Michigan Traffic Crash Report Forms (UD-10) submitted by local police departments, sheriff’s offices, and the Department of State Police. This data was processed by the Criminal Justice Information Center, which had implemented a modern computer infrastructure system beginning in 2002 to improve data quality, timeliness, and accuracy through electronic collection and enhanced error checking. Supplementary exposure data, including vehicle miles traveled, licensed driver counts, and motor vehicle registrations, were obtained from the Departments of Transportation, State, and Community Health. The findings indicate that 2005 marked the lowest mileage death rate in Michigan’s recorded history at 1.09 deaths per 100 million miles of travel, continuing a downward trend since 1999. There were 1,129 fatalities, a 2.6 percent decrease from 2004, alongside a 9.2 percent drop in injuries and a 5.9 percent reduction in total crashes, which numbered 350,838. Despite these improvements, alcohol remained a significant factor; 30.8 percent of fatal crashes involved drinking, and 41.7 percent of alcohol-related crashes resulted in injury or death. Single-vehicle crashes accounted for 35.9 percent of all crashes and 46.9 percent of fatal crashes. Excessive speed was cited as the hazardous action in 12.5 percent of fatal crashes. Additionally, drivers under 25 comprised 21.5 percent of those involved in fatal crashes. Exposure factors showed a 1.3 percent increase in vehicle miles traveled to 103.2 billion, while licensed drivers and vehicle registrations saw slight declines. The significance of this report lies in its provision of detailed, high-quality data that informs public safety strategies and policy decisions. By highlighting specific risk factors such as alcohol involvement, speeding, and age-related crash patterns, the document supports targeted interventions by the Office of Highway Safety Planning and other agencies. The continued improvement in data collection systems ensures that these statistics are reliable for tracking long-term trends and evaluating the effectiveness of safety programs. The report serves as a critical resource for understanding the dynamics of traffic safety in Michigan, offering evidence-based insights to further reduce fatalities and injuries on state roadways.

Key finding

Michigan recorded 1,129 traffic fatalities and a mileage death rate of 1.09 in 2005, with 30.8 percent of fatal crashes involving drinking drivers.

Methodology

dataset

Provenance

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Topics

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• incidence prevalence
• fatality injury trends
• demographic disparities
• comparative international

Information type

What kind of knowledge this paper contributes, grouped by family — independent of topic (what it is about) and method (how it was studied).

• Empirical Findings: crash risk outcomes