It is also important to note that the police CAN order you from the car without telling you why. And, in most instances, you MUST comply or risk arrest!
The officer gets to control the contact, not the suspect.
If someone pulls off the road onto private property or a residence AFTER I activated my lights, then locks the doors - my weapon will come out and I WILL be calling for a few friends. The hink factor would immediately go to Factor 10! I would then call to the driver to exit the vehicle with his license, registration and insurance in hand - and nothing else. If he refused, I would stand at a position of cover with my weapon aimed in his direction and watching the residence (if any) and the area around me for a possible ambush.
Once cover arrived, I would make contact, once again demand compliance and that he step from the vehicle. If the refusals continued, he would be informed that continued refusal will result in his arrest. If compliance is still refused, we'd make a plan to distract and force entry to the vehicle to affect the arrest. Then, we'd impound the car ... if he was in his own driveway, we might leave it unless he wanted us to tow it since it would be minus at least one window and therefore at risk of being ripped off.
This would be a classic way of turning a simple traffic offense into a HUGE problem for the suspect. Why some people might choose to create a mountain from that molehill, I cannot comprehend.