What should CMV drivers do with their mirrors?

Answer: D — Check them every 5 to 8 seconds

CMV drivers should check their mirrors every 5 to 8 seconds as this practice strikes a balance between maintaining awareness of the surrounding environment and allowing enough time to focus on the road ahead. This interval ensures that drivers are routinely aware of other vehicles and potential hazards, which is critical for safe driving, especially in larger vehicles where visibility can be limited. By checking mirrors frequently within this timeframe, drivers can detect changes in traffic conditions, monitor blind spots, and facilitate safer lane changes or maneuvers. This habit helps prevent accidents and supports overall road safety. Adopting this frequency aligns with best practices in defensive driving for commercial motor vehicles, helping drivers make informed decisions while on the road.