Increasing Seat Belt Use through State-Level Demonstration Projects: A Compendium of Initial Findings

Blomberg, Richard D.; Thomas, F. Dennis; Cleven, Arlene M. · 2008 · ROSA P / United States. National Highway Traffic Safety Administration

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Summary

This report summarizes the initial findings from four state-level demonstration projects funded by the National Highway Traffic Safety Administration (NHTSA) to increase seat belt use in states with secondary enforcement laws or low usage rates. The study addresses the challenge of improving occupant protection in jurisdictions where police cannot stop drivers solely for seat belt violations, a condition associated with lower compliance. The projects, conducted between 2002 and 2005 in Idaho, Kansas, Massachusetts, and North Dakota, aimed to supplement the national "Click It or Ticket" (CIOT) enforcement mobilization with innovative, locally tailored strategies. The research sought to determine if these additional interventions could produce meaningful increases in belt use beyond what CIOT achieved alone and to identify effective implementation methods. The methodology involved cooperative agreements providing up to $300,000 per state for demonstration projects. Each state conducted an occupant protection assessment to identify specific barriers, such as cultural impediments or low fines, and designed interventions accordingly. Idaho focused on rural families and young males in eastern Idaho using a "family values" message and a law enforcement liaison. Kansas tested corridor enforcement strategies on high-traffic roadways. Massachusetts combined statewide media with special overtime enforcement and localized education. North Dakota targeted male pickup truck drivers, a group with historically low usage, using motivational messaging. All projects included rigorous evaluation components, utilizing observational surveys, public opinion polls, and enforcement data to measure outcomes and guide mid-course corrections. The results indicated that all four states achieved significant statewide increases in seat belt use. Idaho saw a 2.3 percentage point statewide increase, with a notable 5.2 percentage point gain in the targeted eastern region. Kansas achieved a 4 percentage point increase during its May mobilization, though the specific corridor enforcement tests did not significantly boost usage beyond maintaining CIOT gains. Massachusetts recorded an 11 percentage point increase, although the effect of the demonstration project was difficult to isolate from the strong statewide CIOT campaign. North Dakota successfully increased belt use among male pickup drivers from 42.1% to 49.5% and raised overall statewide usage from 57.5% to 63.4%. The study also found that residents in secondary law states often mistakenly believed their laws were primary, yet enforcement visibility remained a stronger deterrent than legal perception. The significance of these findings lies in the validation of combining national enforcement mobilizations with targeted, innovative local strategies. The report concludes that embedding evaluation processes throughout the project lifecycle allowed states to refine interventions and improve effectiveness. Key lessons include the importance of direct engagement with law enforcement agencies, the utility of financial or equipment incentives for police participation, and the need to conduct small-scale intervention evaluations during periods when large mobilizations are not active to avoid masking effects. The study suggests that this approach is productive for increasing seat belt use in secondary law states and elevating occupant protection as a priority in state safety hierarchies.

Key finding

All four states achieved significant statewide increases in seat belt use, with Idaho seeing a 2.3 percentage point statewide rise and North Dakota increasing usage among male pickup drivers from 42.1% to 49.5%.

Methodology

field_study

Provenance

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Topics

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• seat belt use
• child passenger safety
• public messaging

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).

• Applied Guidance: countermeasure evaluation, policy recommendations
• Empirical Findings: observational prevalence