By Lisa Rapaport (Reuters Health) - Filming teens while they drive and blocking cell phone signals inside their cars may both help reduce distractions that lead to crashes, a small study suggests. "We found a large, significant reduction in high-risk driving events like hard braking and sudden swerving," said lead study author Dr. Beth Ebel, director of the Harborview Injury Prevention and Research Center at the University of Washington School of Medicine in Seattle. The number of teen drivers involved in fatal crashes has dropped by more than half over the past decade as safer vehicles hit the road and more young people received restricted licenses, according to a recent U.S. report. Some drove with in-vehicle cameras, some were recorded and also had cell phone signals blocked inside the car, and a third group had no intervention.

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