Federal safety investigators are calling on a nationwide ban on all driver cell phone use.

According to the National Transportation Safety Board (NTSB), talking, text or emailing while behind the wheel is too dangerous to be allowed, even if using a hands-free device.

The ban would make an exception for devices deemed to aid driver safety, such as GPS navigation systems.

Currently, 35 states, including New York, and the District of Columbia have a law on texting while driving. No states ban the use of hands-free devices for all drivers, making the NTSB recommendation the toughest yet.