Nearly 70 percent of Americans say they “rarely” or “never” use a cell phone while driving, a new Quinnipiac Poll says, and almost two thirds say they think a national ban on the practice is a good idea. Predictably, reported on-the-road cell phone use is highest among younger Americans, while support for a ban increases with age. (Telephone survey 2,424 registered voters nationwide; margin of error +/- 2 percentage points.)