Study: Kids Safer Driving With Grandparents - FoxNews.com

Study: Kids Safer Driving With Grandparents - FoxNews.com: "The study found that kids may be safer in cars with grandma or grandpa at the wheel instead of mom or dad."

I wonder if they took into account the type of driving that parents do vs. grandparents. Parents may be more likely to drive children in more dangerous traffic (i.e. driving to school during rush hour).