While you may be hesitant to report a DUI because you are not positive that is driving under the influence, it is better to be safe than sorry. By reporting a driver, you could be potentially saving a life, considering the fact that many DUI accidents end in either the death of the driver or the death of an innocent citizen. If you do notice that someone is driving erratically, such as swerving or drifting to the side of the road, make sure that you keep your distance from the driver. You do not want to risk getting yourself into an accident while trying to prevent one. From a distance, try to find out the make, model, color, plate number, and plate state of the car. Before notifying the police, you should also make sure you know where you are and where you think the DUI vehicle is going so that you can accurately report the vehicle. Then, call 911 and report the driver, making sure that you give them all of the details that you noticed about the vehicle. Your local South Carolina police department will then hopefully be able to get that driver off of the road and possibly prevent an accident because of your assistance.