In considering whether your company establishes a policy against your employees driving distracted, you may wish to view other sample policies to assist you in crafting the policy right for your company.  Here are some examples:

National Safety Council Cell Phone Policy Kit

South Dakota’s Safety Council’s Sample Company Policy Human Resources’ Sample Company Policy 

These links are provided as a convenience to you and for informational purposes only. It does not constitute legal advice. You may wish to contact an employment/labor lawyer to assist you in drafting and implementing your company policy.