For Dr. Charles Jennissen, who specializes in pediatric emergency medicine at the University of Iowa Hospitals and Clinics, all-terrain vehicle or ATV safety for young people is personal. His 13-year-old cousin,  Kenny, and a friend were killed in an accident as they were riding together on an all-terrain vehicle (ATV) after they pulled onto a road and were struck by an oncoming driver.

Unfortunately, Jennissen says, stories like his cousin’s are...