Visibility reduction refers to the decrease in the ability to see clearly, often caused by environmental factors. Common causes include fog, smoke, heavy rain, or snow, which can obscure vision on roads and in the atmosphere. This phenomenon can pose safety risks, particularly for drivers and pedestrians. In addition to weather conditions, visibility reduction can also occur due to pollution or dust storms. These factors can create a haze that limits sight distance, making it difficult to identify objects or navigate safely. Understanding visibility reduction is essential for ensuring safety in various situations.