What's legal and what's not? Answers to frequently asked questions on traffic stops, roadblocks and searches.

What should I do if a police officer pulls me over?

Remain as calm as possible, and pull over to the side of the road as quickly and safely as you can. Roll down your window, but stay in the car -- don't get out unless the officer directs you to do so. It's a good idea to turn on the interior light, turn off the engine, put your keys on the dash and place your hands on top of the steering wheel. In short, make yourself visible and do nothing that can be mistaken for a dangerous move. For example, don't reach for a purse or backpack or open the glove box unless you've asked the officer's permission, even if you are just looking for your license and registration card. The officer may think you're reaching for a weapon.

When the officer approaches your window, you may want to ask (with all the politeness you can muster) why you were stopped. If you are at all concerned that the person who stopped you is not actually a police officer (for example, if the car that pulled you over is unmarked), you should ask to see the officer's photo identification along with her badge. If you still have doubts, you can ask that the officer call a supervisor to the scene or you can request that you be allowed to follow the officer to a police station.

If a police officer pulls me over, can she search my car?

Yes, if the officer reasonably suspects criminal activity or if she fears for her safety. A solid hunch is all that's required, and the search may be valid even if the real reason behind the officer's decision to enforce a traffic law was her feeling that you were doing something illegal.

If the officer has reason to think that you pose a danger to her safety, she is allowed to search you and the immediate area around you (this may include the passenger compartment of your car and its contents -- such as bags or a briefcase -- and your glove compartment). For example, a driver who is belligerent and threatening might be asked to step out of the car for a pat-down while the passenger compartment, including a duffel bag, is searched for weapons.