Having been in law enforcement and the related for 45 years, I will state how I might operate my vehicle with certain transmitting devices. I would not be overly concerned if at all about using a ham, gmrs or cb radio in my vehicle. There may be a law in some states you can't have a transmitting device such as a microphone in your hand in some states but it is hardly enforced if at all and more importantly there is NO EVIDENCE that the person was operating (transmitting) on such a device even if involved in a motor vehicle accident. A cellular telephone is another matter. Most states make it very clear in their law you can't talk or text on a cellular telephone in your hand up to or about your face. It is allowed in most states I am aware, you can talk through your cellular phone if you speak in a remote mode hands free... say through the car stereo system. HOWEVER, THERE IS A HARD COPY RECORD OF A PERSON SPEAKING OR TEXTING ON A CELLULAR TELEPHONE WHILE OPERATING A VEHICLE OBTAINABLE THROUGH THE CELL PHONE CARRIER. If the person operating the vehicle is involved in a motor vehicle accident, possibly a serious motor vehicle accident and definitely involved in a fatal motor vehicle accident, the POLICE and the CIVIL ATTORNEY will obtain a COURT ORDER and show the operator's activity at the time and date of the accident and it WILL be used against the operator as "inattentive" to driving.