Maintaining a safe driving distance gives you a better chance to respond to unexpected problems with the cars ahead of you or distractions in your own vehicle. In good driving conditions in terms of weather, lighting and low traffic volume there are recommendations according to the 3 second rule and number of feet per miles per hour. An approximate calculation based on the average length of a car being 16 feet, is 3 car lengths per every 10 mph. Example 30 mph would be 9 car lengths or 60 mph would be 18 car lengths. In heavy traffic, night driving or when weather conditions are not ideal the recommendation is to double the distance and in very poor weather tripling the distance.
Keeping this safe distance can reduce your chance of an accident by giving you more time to react keeping you and your family safe.