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Adoption of rollover protective structures (ROPS) on U.S. farm tractors by state: 1993-1995, 2001, and 2004
1National Institute for Occupational Safety and Health, Division of Safety Research, Morgantown, West Virginia, USA. dlh6@cdc.gov
Journal of Agricultural Safety and Health
|June 17, 2011
Summary
Rollover protective structure (ROPS) prevalence increased in most US states, but many still have low rates and high tractor overturn fatalities. Targeted ROPS promotion is needed in specific regions to improve farm safety.
Area of Science:
- Agricultural Safety and Health
- Public Health Surveillance
- Injury Prevention Research
Background:
- Tractor overturns remain a significant cause of farm-related fatalities.
- Rollover protective structures (ROPS) are critical safety devices for tractors.
- Variations in ROPS adoption exist across different US states.
Purpose of the Study:
- To compare state-level ROPS prevalence rates over time (1990s vs. 2000s).
- To examine the relationship between ROPS prevalence and tractor overturn fatality rates by state.
- To identify geographic areas needing increased ROPS promotion.
Main Methods:
- Data on tractor and ROPS-equipped tractor prevalence from 1993-1995 and 2001/2004 were obtained from USDA-NASS surveys.
- Paired t-tests were used to assess changes in ROPS prevalence within states.
- Poisson regression analyzed the association between ROPS prevalence and tractor overturn fatality rates.
Main Results:
- 49 states showed an increase in ROPS prevalence; 34 had statistically significant increases.
- Southeastern and some western states demonstrated major ROPS adoption shifts.
- Northeastern and upper midwestern states remained in the lowest quartile for ROPS prevalence.
- States with low ROPS prevalence consistently exhibited higher tractor overturn fatality rates.
Conclusions:
- A clear link exists between low ROPS prevalence and high tractor overturn fatalities.
- Despite progress, national protective ROPS levels are not projected until after 2015, and regionally (Northeast/Midwest) after 2020.
- Addressing tractor overturns requires organized commitment and resources, focusing on high-risk geographic areas.
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