The National Safety Council has called on drivers to stop using cell phones and other communication devices while driving. The organization has also encouraged businesses to institute policies prohibiting their employees from driving and using a mobile phone. In addition, the NSC called on the governors and legislators of all 50 states as well as the District of Columbia to pass laws banning the use of cell phones while driving. A study conducted by the Harvard Center of Risk Analysis found that cell phone use while driving plays a role in 6 percent of accidents.