What should a driver do before making a lane change?

Before making a lane change, it's essential for a driver to check mirrors and blind spots to ensure that the maneuver can be completed safely. This practice allows the driver to be aware of surrounding traffic, including any vehicles that may be in adjacent lanes or possibly in the driver's blind spots, which are areas not visible in the mirrors.

Performing this action significantly reduces the risk of a collision during the lane change. When a driver checks both the mirrors and blind spots, they can identify whether it is safe to proceed or if they need to wait for a clearer gap in traffic. This step is critical in maintaining overall road safety and ensuring that the lane change does not interfere with other drivers.

The other options may not prioritize safety or the necessary awareness required before changing lanes. For example, signaling alone does not guarantee that the lane is clear, while speeding up could create a dangerous situation if other drivers are not aware of the driver's intentions. Waiting for the car behind to pass may not always be practical or necessary, depending on the traffic situation. Therefore, checking mirrors and blind spots is a fundamental practice that enhances safety during lane changes.