What indication should a driver look for while driving to signal that it is safe to change lanes?

The correct response emphasizes the importance of having a clear and unobstructed view of the lane before changing lanes. This visibility is critical in ensuring that there are no obstacles, vehicles, or hazards in the intended lane that could lead to accidents. When a driver can see clearly into the lane they wish to enter, they can better assess whether it is safe to make the maneuver, thus contributing to safer driving practices.

While surrounding traffic and distances between vehicles are important factors to consider, they do not replace the necessity of having a clear line of sight. For example, if a driver notices a vehicle indicating a lane change, this signal could suggest the lane is currently being occupied or is not safe for entry, even if the other conditions appear favorable. Likewise, consistent speed or following distances may not always reflect the roadway's immediate safety conditions. Therefore, ensuring a clear view remains the primary indicator for safely changing lanes.