How should the rearview mirror be adjusted?

Adjusting the rearview mirror to frame the back windshield is essential for ensuring optimal visibility while driving. This position allows the driver to see as much of the rear view as possible, helping to monitor traffic behind the vehicle. When the rearview mirror is correctly adjusted, the driver can easily see other vehicles, which is crucial for safe maneuvers like changing lanes or merging onto highways.

The rearview mirror should provide a clear view of the road behind, rather than focusing solely on the interior of the car or checking on rear passengers. While awareness of rear passengers is important, primarily, the mirror's main function is to enhance overall driving safety by offering a view of the road behind. Additionally, the mirror cannot adjust for blind spots; those are typically addressed with side mirrors and checking over the shoulder. Thus, framing the back windshield is the logical and safest adjustment for maximum rear visibility.