If you can't see the driver's face in the rearview mirror, what can you assume about their ability to see you?

The best assumption when you cannot see a driver's face in the rearview mirror is that they are unable to see you. This often indicates that their line of sight is obstructed, whether due to a larger vehicle, an angle that limits their view, or other factors affecting visibility. Being unable to see the driver's face suggests that they may not be aware of your presence, which is critical for safety while driving.

Proper awareness of visibility in traffic situations is essential; if a driver cannot see other vehicles, it increases the risk of accidents. Therefore, if you cannot see the driver’s face, it is prudent to assume that they might not see you, prompting caution in your driving behavior, such as avoiding cutting in front of another vehicle or assuming they will yield.