Which situation requires you to check your mirrors most carefully?

Checking your mirrors carefully before changing lanes is crucial because this action directly involves navigating into an area where other vehicles may already be present. A thorough mirror check allows you to be aware of any traffic behind and beside you, ensuring that it is safe to move over without endangering yourself or others.

Mirrors help you assess the speed and distance of vehicles that might be in your blind spots, which are areas not visible directly through the rearview mirror or side mirrors. By being vigilant and checking your mirrors thoroughly before making the lane change, you can detect any fast-approaching vehicles or obstacles, thereby preventing collisions and enhancing overall road safety.

In contrast, while making a right turn does require attention to surrounding traffic, it typically occurs at lower speeds and in environments where visibility can be checked more directly, such as looking over your shoulder. When approaching a stop sign, the primary focus is on understanding the intersection and assessing when to stop rather than changing lanes. While driving straight does necessitate general awareness of your surroundings, it does not demand the same level of heightened mirror checks as changing lanes does.