Societal costs of traffic crashes and crime in Michigan : 2011 update.
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Summary
This report, produced by the University of Michigan Transportation Research Institute (UMTRI), estimates the monetary and nonmonetary societal costs of traffic crashes and index crimes in Michigan for the year 2009. The study aims to provide comparable, up-to-date cost data to inform public resource allocation and policy decisions regarding crash and crime prevention. It is the fifth in a series of such reports, expanding previous methodologies to include specific subcategories of traffic crashes: those involving teen drivers, motorcyclists, and unrestrained occupants. The methodology involved applying updated cost estimates (in 2010 dollars) developed by the Pacific Institute for Research and Evaluation to 2009 incidence data from the Michigan Motor-Vehicle Crash file and the Michigan State Police Uniform Crime Reporting Program. Costs were categorized into monetary components (medical care, future earnings, public services, and property damage) and nonmonetary quality-of-life costs (pain, suffering, and fear). Index crimes included murder, rape, robbery, aggravated assault, burglary, larceny, and motor vehicle theft; arson was excluded due to estimation complexities. Analyses were conducted at both the statewide and county levels. The findings indicate that in 2009, index crimes resulted in $1.9 billion in monetary costs and $4.7 billion in total costs. In contrast, overall traffic crashes incurred $4.8 billion in monetary costs and $9.1 billion in total costs, confirming that the economic burden of traffic crashes exceeded that of index crimes by more than double. Specific crash subcategories accounted for significant portions of these losses: alcohol-involved crashes cost $0.8 billion monetarily and $1.9 billion in total; teen-driver-involved crashes cost nearly $1 billion monetarily and $1.8 billion in total; motorcyclist-involved crashes cost $0.4 billion monetarily and $0.8 billion in total; and injury crashes involving unrestrained occupants cost $0.5 billion monetarily and $1.2 billion in total. Detailed tables provide per-victim cost estimates broken down by injury severity and crime type. The significance of this report lies in its quantification of the substantial economic impact of traffic safety issues relative to crime in Michigan. By demonstrating that traffic crashes impose a greater financial burden on society than index crimes, the study supports prioritizing traffic safety interventions. The inclusion of specific high-risk groups, such as teen drivers and unrestrained occupants, provides targeted data for policymakers to evaluate the cost-effectiveness of specific prevention strategies. The report concludes that based on dollar losses, the magnitude of the traffic crash problem clearly exceeds that of index crimes, offering a common metric for comparing competing public safety initiatives.
Key finding
Traffic crashes in Michigan generated $9.1 billion in total societal costs in 2009, which was nearly double the $4.7 billion in total costs attributed to index crimes.
Methodology
dataset
Provenance
The full processing record for this entry. Every stage of this paper's journey through the pipeline is logged — what ran, with which tool and model, how many attempts it took, and when it last completed. Discovered via bulk_ingest_rosap on 2026-05-23 (6 acquisition events logged).
| Stage | Outcome | Tool | Model | Prompt | Attempts | Completed |
|---|---|---|---|---|---|---|
| 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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- Empirical Findings: crash risk outcomes