(3) Driver distractions. Vehicle operators on a DoD installation and operators of Government owned vehicles shall not use cell phones unless the vehicle is safely parked or unless they are using a hands-free device. The wearing of any other portable headphones, earphones, or other listening devices (except for hand-free cellular phones) while operating a motor vehicle is prohibited. Use of those devices impairs driving and masks or prevents recognition of emergency signals, alarms, announcements, the approach of vehicles, and human speech. DoD component safety guidance should note the potential for driver distractions such as eating and drinking, operating radios, CD players, global positioning equipment, etc. Whenever possible this should only be done when the vehicle is safely parked.