What does it mean if you can't see another vehicle's rear-view mirror?

When you cannot see another vehicle's rear-view mirror, it indicates that you are positioned in their blind spot. A blind spot is an area around a vehicle that cannot be directly observed by the driver while looking through the mirrors. This typically occurs when you are driving alongside the vehicle, slightly behind it, making it difficult for the driver to see you. Being aware of blind spots is crucial for safety; avoiding them when changing lanes or merging can help prevent collisions.

The other options do not accurately describe the situation. Being too far to the right typically wouldn't block a driver’s view of their rear-view mirror. Being in a position that is considered safe would imply visibility and awareness of other vehicles, which would not align with being in a blind spot. Accelerating when in a blind spot is not a safe maneuver; it increases the risk of an accident since the driver may not be aware of your presence. Understanding the concept of blind spots is essential for safe driving practices and ensuring your own safety as well as that of others on the road.