Idaho Traffic Collisions, 2002

NHTSA · 2002 · ROSA P / Idaho. Office of Highway Safety

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Summary

This report, titled *Idaho Traffic Collisions, 2002*, provides a comprehensive statistical analysis of motor vehicle collisions in Idaho for the year 2002. Prepared by the Idaho Transportation Department’s Office of Highway Safety, the document aims to assist state and local agencies in identifying traffic safety problems and targeting collision reduction programs. The data is derived from the Idaho Transportation Department State Collision Database, which includes collisions investigated by law enforcement that resulted in injury, death, or property damage exceeding $750. The report categorizes data by collision severity, roadway classification, time, driver demographics, and specific safety focus areas such as impaired driving and restraint usage. In 2002, Idaho recorded 26,477 total collisions, a 1.5% increase from 2001. Fatal collisions rose by 2.2% to 230, resulting in 264 fatalities, while injury collisions increased by 5.0% to 9,688, affecting 14,762 individuals. The statewide fatality rate was 1.85 per 100 million vehicle miles traveled (VMT), and the injury rate was 103.21. The estimated economic cost of these collisions exceeded $1.6 billion, with society bearing approximately 75% of the costs through taxes, insurance premiums, and other public expenditures. Rural roadways accounted for 80% of fatal collisions, despite comprising only 41% of total collisions, highlighting the higher risk associated with rural driving conditions. The analysis reveals distinct patterns in collision circumstances. Single-vehicle collisions, though less frequent, were nearly twice as likely to result in fatalities as multiple-vehicle collisions. Speed was the primary contributing factor in single-vehicle crashes (34%), while inattention or distraction was the leading cause in multiple-vehicle crashes (25%). Overturns were the most harmful event in fatal single-vehicle collisions, accounting for 73% of such fatalities; notably, 86% of occupants killed in rollovers who were not wearing seat belts were ejected. July recorded the highest number of fatal collisions, while winter months saw higher total collision counts, often attributed to severe weather. The report also details collision rates by county and city, with Ada County recording the highest volume of collisions due to its large population. The significance of this report lies in its role as a foundational resource for highway safety planning. By correlating collision data with exposure measures like licensed drivers and VMT, the document identifies specific problem areas, such as the disproportionate number of fatalities on rural roads and the critical impact of seat belt usage in rollover crashes. The findings support targeted interventions in focus areas designated by the Idaho Traffic Safety Commission, including impaired driving, aggressive driving, and safety restraint usage. The data underscores the substantial economic burden of traffic collisions and provides evidence-based insights for developing strategies to reduce fatalities and injuries in Idaho.

Key finding

Single-vehicle collisions represented 31% of all traffic incidents but accounted for 46% of all fatal collisions in Idaho during 2002.

Methodology

dataset

Provenance

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Topics

Ranked by relevance to this paper. Hover a topic for its definition.

• 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, observational prevalence
• Methodological Resource: dataset resource