An observational survey of safety belt and child safety seat use in Virginia : the 1989 update.

Stoke, Charles B · 1991 · ROSA P / Virginia Transportation Research Council (VTRC)

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Summary

This report evaluates safety belt and child safety seat usage in Virginia to assess the impact of statutory enactments, enforcement campaigns, and public information efforts. Conducted by the Virginia Transportation Research Council for the Department of Motor Vehicles, the study aims to track changes in restraint use following the 1982 child safety seat law and the 1987 occupant restraint law (Mandatory Use Law, or MUL), which required front-seat occupants to wear belts. The research also seeks to identify user characteristics to inform future safety initiatives. Data were collected through observational surveys at signalized intersections in Virginia’s four major metropolitan areas from 1974–1977 and 1983–1989. Starting in 1987, nine smaller communities were added to the survey sites. Observers recorded restraint use, occupant age, and sex for vehicles with Virginia license plates during morning, mid-day, and afternoon periods. The study distinguishes between pre-MUL data (1985–1987) and post-MUL data (1988–1989). Statistical significance was tested only for the decline in use between 1988 and 1989, as the initial post-law increases were deemed sufficiently large to be policy-relevant without further testing. The findings indicate that belt use increased markedly after the enactment of both statutes. Child safety seat use stabilized at approximately two-thirds of surveyed infants over the seven-year post-law period. Front-seat belt use peaked at nearly 63% within six months of the MUL’s effective date but declined significantly to about 55% by 1989 ($p < .01$). Driver use followed a similar trajectory, dropping from 68.9% in 1988 to 61.0% in 1989. Rear-seat occupants, who were not covered by the MUL, showed lower and more variable use rates, with a significant decline observed among rear passengers riding with belted drivers. Misuse of child safety seats was prevalent, with nearly 42% of infant restraints categorized as incorrectly used in 1987 due to stricter observation criteria. Use rates were highest among older adults and in northern Virginia, while young males and residents of rural areas exhibited lower compliance. The authors conclude that the passage of mandatory use statutes was the primary driver of increased belt usage. However, the subsequent decline in front-seat use and persistently low rear-seat use suggest that enforcement and public information efforts must be sustained and expanded. Recommendations include targeting public information and enforcement toward rear-seat occupants, young males, and residents of smaller communities and rural areas. The report also suggests modifying the mandatory use law to include rear-seat occupants to improve overall safety outcomes.

Key finding

Front seat safety belt use peaked at nearly 63 percent in the first six months after the occupant restraint law took effect and subsequently declined to about 55 percent, while child safety seat use remained stable at approximately two-thirds.

Methodology

field_study

Provenance

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Topics

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• seat belt use
• child passenger safety

Information type

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• Empirical Findings: observational prevalence, crash risk outcomes