Justin Peacock (left) helps fellow Gators fan Mike Starling drink the "World's Largest Outdoor Cocktail" during tailgating activities at a recent University of Florida game. The parties outside stadiums are under fire amid growing concerns about underage drinking, drunken driving and other risky behaviors. Greg Allen/NPR hide caption

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A driver uses a cell phone in Freeport, Maine, in September. Maine and more than a dozen other states have implemented laws to curb distracted driving practices such as texting or talking on cell phones while operating a car. Robert F. Bukaty/AP hide caption

itoggle caption Robert F. Bukaty/AP

Basil Rynestead, 17, sits in the driver's seat of his Toyota pickup truck. New federal government numbers confirm that male drivers are still having twice as many fatal crashes as females. And the boys are more likely than the girls to have been speeding or drinking. Sarah Nathan/NPR hide caption

itoggle caption Sarah Nathan/NPR

A dummy is used in a demonstration test of seat-back head restraints at the Insurance Institute for Highway Safety. Brian Naylor/NPR hide caption

itoggle caption Brian Naylor/NPR