Various car makers provide various technologies to get the driver and car protected from the vehicles traveling in the blind spot areas. From radars to camera technology has been introduced, but still, a huge volume of vehicles have no special feature to avoid such situations.
So to keep yourselves and others protected Society of Automotive Engineers (SAE) published a paper in 1955 to adjust your outside rear view mirrors in a way to eliminate the blind spots near around your vehicle.
The paper advocates adjusting the mirrors so far outward that the viewing angle of the side mirrors just overlaps that of the cabin’s rear view mirror. This can be disorienting for drivers used to seeing the flanks of their own car in the side mirrors. But when correctly positioned, the mirrors negate a car’s blind spots. This obviates the need to glance over your shoulder to safely change lanes as well as the need for an expensive blind-spot warning system.
Getting used to these mirror positions by SAE might be uncomfortable but eventually it helps a lot in daily driving situations. The cabin’s rear view mirror is used to keep an eye on what is coming up from behind, while the outside mirrors reflect the area outside the view of the inside rear view mirror.