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Gerene Denning, of the University of Iowa Department of Emergency Medicine, presented this at CPSC's ATV Safety Summit Oct. 12, 2012. Off-Highway Vehicle Parks: Do Increased Regulations and Enforcement Improve All-Terrain Vehicle Safety? Objectives: To determine whether there were differences in crash mechanisms and/or compliance with ATV safety laws and regulations when comparing off-road ATV crashes inside and outside state OHV parks. Methods: Data from our Iowa ATV injury surveillance database (2002-2009) were analyzed. Results: 813 persons were included in the analysis, 6% from OHV park crashes. Relative to outside the parks, a smaller percentage of park victims were under the age of sixteen (7% vs. 31%, p<0><0><0.001). Mean injury severity scores were not different inside and outside OHV parks, but 5% of outside victims had severe brain injuries (GCS =8) as compared to no park victims. Conclusions: OHV park crashes involved more jump-related events, suggesting that additional approaches are needed to identify high-risk areas and improve park safety. However, park victims exhibited better compliance with ATV safety-related laws and regulations and suffered less severe brain injury outcomes. These findings support the hypothesis that ATV safety regulations with effective enforcement promote safe behaviors and may prevent injuries.