How can you verify that the right side mirror is correctly positioned?

The correct method to verify that the right side mirror is correctly positioned is to ensure that you can just see the side of your vehicle on its inside edge. This positioning allows the driver to maintain an appropriate field of view while minimizing blind spots. By being able to see the side of your vehicle, you can better gauge your distance from other vehicles and objects when merging, changing lanes, or navigating tight spaces.

This approach prioritizes safety, as it strikes a balance between visibility of the vehicles behind and to the side, while also ensuring you're aware of your vehicle's dimensions. It enables the driver to maintain a proper awareness of their surroundings, which is essential for safe driving practices. Proper mirror adjustments are critical in reducing the risks of accidents arising from blind spots or misjudged distances.

Other options do not fully ensure optimal safety and awareness. Seeing the road behind, for instance, may not provide a comprehensive view of what's beside you and could potentially increase blind spots. An angle slightly downward might not be appropriate for all drivers, as it can vary based on individual needs and heights. Similarly, adjusting based on height alone isn't sufficient; the focus should be on ensuring that the side of the vehicle is visible in the mirror regardless of driver height.