Once you initiate the stop and the offending vehicle has pulled over, place your police cruiser in the left offset position. The left offset position is approximately 2 to 3 feet to the left lining up the center of the cruiser's hood with the left rear fender and 15 to 25 feet or one to one-and-a-half car lengths behind the offender's vehicle. A good rule of thumb to follow is to be far enough back to be able to see the offending vehicle's rear tires touching the pavement. This position allows the rear of your cruiser to absorb most low speed impacts from a rear-end collision while keeping the passenger compartment intact. It also provides a very important safety zone for the offender to use when walking back to you.
After placing your cruiser in the proper left offset position, unlock your passenger door, quickly check for traffic, and exit the vehicle. You want to be the first one out on your feet at any traffic stop. This gives you the tactical advantage should you come under attack and have to react. Once you exit your cruiser, stand by its driver-side door for a couple of seconds to ensure the offending vehicle's occupants are not exiting. If someone tries to exit the vehicle, you can either order them back into the vehicle or over to the side of the road where you can keep an eye on them.
If no one exits the vehicle, move around the back of your cruiser to the front passenger-side door. During a night stop, "duck down" when passing the overhead lights so that your movements will go undetected. You can call someone out from the driver's side of your cruiser but it's better to do it from the passenger side should you come under attack and be forced to move to cover.
When you reach your passenger side door, open the door and retrieve the public address (PA) microphone. Using the PA system, instruct the operator of the offending vehicle to turn off his or her ignition. The last thing you want to see is the violator's vehicle go rolling down the street because this rocket scientist forgot to put it in park before he stepped out of the car. Believe me, it happens.
Once the vehicle has been turned off, instruct the violator to exit his vehicle and walk back to your location. This isn't a high-risk stop, so there's no need to have the driver turn around and walk backward to your location. However, you do want the driver to walk slowly enough that you can perform a visual frisk for any suspicious bulges that may indicate the presence of a weapon or to read any threatening body language.