Some insurance companies are allowing drivers to pay less when they can prove they are a good driver. With good driver rates, they are able to save more than other drivers because the insurance company knows these drivers are less likely to have an accident. In most cases, a device is plugged into the car, which records data on how hard the driver brakes, how often the person drives and when they drive. Drivers who spend a lot of time in their vehicle at night or hit the brakes hard would not be eligible for a good driver discount. Usually, the data is collected and applied to the next policy.