What is a common mistake new drivers make when switching lanes?

New drivers often overlook the importance of checking blind spots when switching lanes. Blind spots are areas that are not visible through mirrors and can conceal other vehicles or obstacles. Failing to check these areas can lead to unsafe lane changes and potential collisions. Proper lane change procedures include signaling your intent to switch lanes, checking mirrors for vehicles already in adjacent lanes, and then physically turning your head to inspect the blind spots before making the maneuver.

The other options, while they may indicate potential issues during lane changes, do not emphasize the critical need to be aware of those areas that are not visible in mirrors. For instance, checking mirrors only does not provide full awareness of surrounding traffic. Similarly, turning on turn signals too early may mislead other drivers about your intended movement or give them insufficient time to react accordingly. Driving too slowly during a lane change can result in creating confusion for other drivers and could pose a risk, but not checking blind spots is particularly dangerous, as it can lead to collisions that might have otherwise been avoided.