The result eliminates the gap in your rearview sight (be sure to test it out, though). Still, drivers rarely set their mirrors this way, and some automakers have tried a technical solution. Ford, for example, has a Blind Spot Information System that uses radar to detect cars coming up from behind and illuminates a small warning light on the side-view mirror. This option runs $1,595, though.
Finally, you could also use a small mirror called a BlindZoneMirror, which comes standard on some models, like the Ford Edge and Chevy Traverse (well, except the base model). These are small mirrors that attach to the side-view mirror and are engineered to make the blind spot visible.
Are Blind Spots a Myth? (Wheels)