Final answer:
Even with proper mirror adjustments, blind spots in a vehicle are typically just over the left and right shoulders of the driver. To help reduce blind spots, drivers may use convex mirrors for a wider field of view. However, drivers should still physically check these areas before changing lanes.
Step-by-step explanation:
When the inside and left side mirrors of a car are adjusted properly, the blind spot is the area that is not visible in either mirror or in your peripheral vision. Normally, this is located just over the driver's left shoulder for the left-side blind spot, and over the right shoulder for the right-side blind spot. Even with mirrors properly adjusted, there will always be areas that the mirrors cannot cover due to the limits of reflection and the positioning of the mirrors relative to the driver's viewpoint.
To fully cover the blind spots using mirrors, some drivers use additional convex mirrors. Convex mirrors curve outward, providing a wider field of view than flat mirrors, which can help reduce and monitor the size of blind spots. It is important to physically check these areas by briefly turning your head and looking over your shoulder before changing lanes to ensure that the space is clear.