Idaho Traffic Collisions, 2004

NHTSA · 2004 · ROSA P / Idaho. Office of Highway Operations and Safety

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Summary

This report, published by the Idaho Transportation Department’s Office of Traffic & Highway Safety, provides a comprehensive statistical analysis of motor vehicle collisions in Idaho for the year 2004. The document serves as a resource for state and local agencies to identify traffic safety problems and target areas for collision reduction and injury prevention programs. It categorizes data based on focus areas adopted by the Idaho Traffic Safety Commission, including impaired driving, safety restraint usage, youthful drivers, aggressive driving, and vulnerable road users. The study utilizes data from the Idaho Transportation Department State Collision Database, which aggregates collision reports from all law enforcement agencies in the state. The dataset includes collisions resulting in injury, death, or property damage exceeding $750, excluding incidents on private property. The report distinguishes between collision, vehicle, and person levels of data, comparing 2004 statistics with prior years and national averages. Additional data sources include the Division of Motor Vehicles for driver licensing information, the Traffic Survey Section for vehicle miles traveled, and the Bureau of Criminal Identification for DUI arrests. In 2004, Idaho recorded 28,332 total collisions, a 6.1% increase from 2003. However, fatalities decreased by 11.3% to 260, resulting in an all-time low fatality rate of 1.75 per 100 million vehicle miles traveled, though this remained higher than the national rate of 1.48. The estimated economic cost of these collisions was approximately $1.65 billion. Key findings indicate that impaired driving contributed to nearly 40% of fatalities, with 87% of victims in these crashes being the impaired driver, a passenger, or an impaired pedestrian. Aggressive driving was a factor in 56% of all collisions and 45% of fatalities. Single-vehicle collisions, while comprising only 32% of total crashes, accounted for 54% of fatalities, with overturns being the leading harmful event. Rural roadways saw 80% of fatal collisions. Youthful drivers (ages 15–19) were 2.4 times more likely to be involved in fatal or injury collisions than expected. Observed seat belt usage reached a high of 74%, yet only 42% of occupants killed in collisions were wearing restraints. The report concludes that while Idaho achieved record-low fatality rates, significant safety challenges persist, particularly regarding impaired driving, aggressive behaviors, and rural roadway safety. The data highlights the disproportionate involvement of young drivers and the critical impact of seat belt non-use on survival rates. These findings underscore the need for targeted interventions in specific demographic and behavioral areas to further reduce the economic and human costs of traffic collisions.

Key finding

Idaho's fatality rate reached a record low of 1.75 per 100 million vehicle miles traveled in 2004, despite a 6.1 percent increase in total collisions.

Methodology

dataset

Provenance

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

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, observational prevalence