How frequently should you check your mirrors while driving?

Answer: B — Every 4 seconds

Checking your mirrors every 4 seconds is crucial for safe driving, particularly for commercial drivers who are operating larger vehicles with more blind spots. This frequent checking allows drivers to stay aware of their surroundings, including other vehicles, pedestrians, and potential hazards. By observing your mirrors at this interval, you can quickly react to changes in traffic, such as vehicles entering your blind spots or sudden movements from other drivers. This practice helps in maintaining overall situational awareness, which is essential to avoid collisions and ensure safe lane changes or maneuvers. While checking mirrors every 2 or 6 seconds may seem reasonable, overly frequent checks could lead to distractions from the road or inadequate time to process information. Likewise, waiting 10 seconds could result in a delayed reaction to critical situations, as you may miss important developments around you during that time. Therefore, the 4-second interval strikes an effective balance between being vigilant and maintaining focus on the road ahead.