Article: Have them make the call and report the driver. Do not try to talk on the phone while you drive, or you could put your life in danger. Move to a safe shoulder off of the road or into a parking lot. Make sure this is a safe place to stop your car for a few minutes. Only call the police once the car is stopped and parked. In the US, this number is 911. Describe the car to the police and tell them where it is headed. Give them as much information as possible about the car. For example, you might say, "I'd like to report a reckless driver. There's a black SUV with Virginia plates speeding down I-40 west. I'm near mile marker 95. They are swerving between lanes, and I think they may be dangerous." Tell them the color and make of the car as well as what road you were driving on. This will help the police be on the lookout for this driver. Some states and local governments have special lines for reckless driving. For example, in Colorado, you can call *277. Look up to see if your state has a similar service. If the vehicle has a "how's my driving" sticker, you may see that there is both a phone number and ID number. Call the phone number, and provide the vehicle's ID to lodge your complaint. You can say, "I'd like to report truck #555. They were tailgating my car and then they made a rude gesture to me as they passed my car." Similarly, If the reckless driver was in a company truck, car, or vehicle, you can report their bad driving to their employer. You should only do this if the driver was in a clearly marked company vehicle.

What is a summary?
Ask your passenger to report the driver. Pull your car over if you do not have a passenger. Call an emergency number if people's lives are in danger. Call the police's non-emergency number if it's not dangerous. Call the phone number on a "how's my driving" sticker.