A blind spot in a vehicle is an area around the vehicle that cannot be directly observed by the driver while at the controls. Blind spots exist in a wide range of vehicles: aircraft, cars, motorboats, sailboats, and trucks. Other types of transport have no blind spots at all, such as bicycles, horses, and motorcycles. Blind spots represent an extreme danger for motorists, especially at highway speeds; each year, thousands of accidents happen when drivers change lanes and collide with other vehicles that were in their blind spots. According to the National Highway Traffic Safety Administration, blind spot-related accidents are responsible for more than 800,000 accidents and more than 300 fatalities each year. These accidents are especially difficult to avoid because even practicing defensive driving is not always enough to prevent them; you cannot react to a vehicle that you cannot see. Proper adjustment of mirrors and use of other technical solutions can eliminate or alleviate vehicle blind spots. The goal of this paper is to study different blind spot detection techniques and to have a comparison between them.