Is It Time to Make Driving on Your Mobile Illegal?

A recent study found that driving while talking on your mobile quadruples your crash risk with only a minor difference between holding the phone to your ear or using a hand-free setup. Assuming this is true, and we’ll need some additional studies to be sure, is it time to make driving while talking on your mobile against the law? At the very least, it looks like all those state laws requiring a hands-free kit are nearly useless (except to those companies selling the kits).