Safety belt and motorcycle helmet use in Virginia : results of the 1992 through 1995 surveys.

Stoke, Charles B · 1995 · ROSA P / Virginia Transportation Research Council (VTRC)

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Summary

This report presents the findings of observational surveys conducted in Virginia from 1992 through 1995 to determine safety belt and motorcycle helmet use rates. The study was initially initiated to qualify the Commonwealth for federal incentive funds under Section 153 of the Intermodal Surface Transportation Efficiency Act (ISTEA), which required states to demonstrate specific compliance levels with mandatory use laws. Although the federal funding program ended after 1993, the Virginia Department of Motor Vehicles requested that data collection continue using identical methods to maintain longitudinal comparability. The methodology adhered to National Highway Traffic Safety Administration (NHTSA) guidelines, utilizing a probability-based survey design with direct observational data. The sampling frame excluded the 74 least populated jurisdictions, which comprised less than 15% of the state’s population. To ensure representativeness, 120 survey sites were selected via random grid sampling, stratified to reflect the urban (68%) and rural (32%) population distribution. Data collectors observed traffic at these sites for one hour each, recording shoulder belt use for drivers and outboard front-seat passengers in passenger cars, as well as helmet use for motorcycle drivers and passengers. Observations on multilane highways were weighted by the number of travel lanes to approximate statewide figures, while motorcycle observations included all lanes. The results indicate that Virginia’s safety belt use rate in 1995 was 70.2%, based on 29,584 weighted observations of passenger car occupants. This figure represents a slight decline from previous years, where rates were 71.6% in 1992, 73.2% in 1993, and 71.8% in 1994. In contrast, the motorcycle helmet use rate remained at 100.0% in 1995, consistent with the 100% compliance observed in all four years of the study. The relative error of the estimate for safety belt use was 0.15%, while the error for helmet use was 0 due to zero variance in the sample. The significance of this report lies in its documentation of sustained high compliance with motorcycle helmet laws and stable, though slightly fluctuating, safety belt usage in Virginia. By maintaining consistent survey methods across multiple years, the study provides reliable longitudinal data for traffic safety analysis. The findings confirm that Virginia met the federal standards for incentive funding during the program's operation and continued to monitor compliance effectively thereafter, offering a baseline for evaluating the impact of safety regulations and enforcement efforts in the state.

Key finding

Virginia's 1995 safety belt use rate was 70.2% and motorcycle helmet use rate was 100.0%, with helmet use remaining at 100% throughout the 1992-1995 study period.

Methodology

field_study

Sample size: 29831

Provenance

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

Topics

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• seat belt use
• incidence prevalence

Information type

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• Empirical Findings: observational prevalence, crash risk outcomes