Same thing as above; slow down, flashers, pull over at the nearest safe place as far off the road as possible.  Turn off the car, radio, etc.  Turn on your interior light if it is dark.  Wait to take your seatbelt off until the officer comes up to your window.  Roll down the window the whole way.  Keep your hands visible, preferably on the steering wheel.  DO NOT GET OUT OF YOUR VEHICLE unless the officer tells you to.  Once the officer comes up to you, then take your seatbelt off and get your driver’s license, vehicle insurance and registration cards.  If you don’t understand something ask for an explanation in a respectful manner.  If you disagree with receiving a citation, do not plead your case at that time, your point of view will be discussed in front of the judge at a later date and time if you desire.  Signing the citation is not an admission of guilt, it just means you received the citation.