Our neighbors to the south, Oregon, have passed a law banning the use of handheld cellphones while driving. We've had a similar law here in Washington for the past year. It does seem to be having some impact, although I still see far too many drivers talking or texting while behind the wheel. I read this interesting comment from a Portland resident upset about the new ban:
"This is only going to cause more accidents. Because people will just fumble around with their phones in the seat next to them, while trying to use the speakerphone option instead. Or even worse, text with the phone in their crotch while repeatedly looking down instead of out of the windshield."