NTSB tells workers to hang up cells

The people who investigate the nation's most high-profile transportation accidents must now practice what they preach: They will no longer be allowed to use cellphones while driving. Debbie Hersman, the new chairwoman of the National Transportation Safety Board (NTSB), said Tuesday that employees of the agency are barred from using any wireless device behind the wheel while on duty. The restriction applies whether the device is hands-free or not. The action appears to make the NTSB the first federal agency to adopt an outright ban of wireless devices while driving, according to the agency and highway safety experts. It also puts stricter rules on NTSB employees than the citizens of all 50 states.