Primary enforcement seat belt laws are effective even in the face of rising belt use rates.

A recent systematic literature review found that primary enforcement laws are more effective at increasing seat belt use than secondary laws in the United States. This report re-examines the studies included in the systematic review to explore whether the benefits of a primary law differ based on: (1) the baseline seat belt use rate; or (2) whether or not the primary law replaces a secondary law. States that directly enacted primary laws showed larger increases in observed seat belt use (median increase of 33 percentage points). These laws were enacted in the mid-1980s, when baseline belt use rates were below 35%. Smaller, but substantial increases in belt use were observed in states that replaced secondary with primary laws (median increase of 14 percentage points). Baseline belt use rates in these states ranged from 47 to 73%. Primary safety belt laws can further increase seat belt use even in states with relatively high baseline levels of belt use.

[1]  Task Force on Community Preventive Services.  Recommendations to reduce injuries to motor vehicle occupants: increasing child safety seat use, increasing safety belt use, and reducing alcohol-impaired driving. , 2001, American journal of preventive medicine.

[2]  Stella M. Yu.  Healthy People 2010 , 1998, Maternal and Child Health Journal.

[3]  C W Preusser,et al.  Evaluation of California's safety belt law change from secondary to primary enforcement☆ , 1995 .

[4]  C W Preusser,et al.  EVALUATION OF LOUISIANA'S SAFETY BELT LAW CHANGE TO PRIMARY ENFORCEMENT , 1997 .

[5]  R B Voas,et al.  Nighttime observations of safety belt use: an evaluation of California's primary law. , 1998, American journal of public health.

[6]  Randy W. Elder,et al.  Methods for conducting systematic reviews of the evidence of effectiveness and economic efficiency of interventions to reduce injuries to motor vehicle occupants. , 2001, American journal of preventive medicine.

[7]  Patricia Dolan Mullen,et al.  Developing an Evidence-Based Guide to Community Preventive Services—Methods , 2000 .

[8]  B J Campbell,et al.  THE RELATIONSHIP OF SEAT BELT LAW ENFORCEMENT TO LEVEL OF BELT USE , 1987 .

[9]  D F Preusser,et al.  EVALUATION OF MARYLAND, OKLAHOMA AND THE DISTRICT OF COLUMBIA'S SEAT BELT LAW CHANGE TO PRIMARY ENFORCEMENT , 2001 .

[10]  Randy W. Elder,et al.  Reviews of evidence regarding interventions to increase the use of safety belts. , 2001, American journal of preventive medicine.

[11]  David W Eby,et al.  The effects of standard enforcement on Michigan safety belt use. , 2002, Accident; analysis and prevention.

[12]  Jonathon M. Vivoda,et al.  STANDARD ENFORCEMENT IN MICHIGAN: A ONE YEAR FOLLOW-UP AND REVIEW , 2001 .