CDL General Knowledge Practice Test

Adjusting the radio while driving should be avoided because it can distract you from focusing on the road and your driving responsibilities. Each moment of distraction increases the risk of an accident, as it takes your attention away from critical tasks such as monitoring traffic, observing other vehicles, and being aware of your surroundings. Distracted driving is a significant contributor to crashes, and even minor adjustments can lead to dangerous situations. The other options—using turn signals appropriately, checking mirrors regularly, and maintaining a safe following distance—are all essential safe driving practices that help ensure both your safety and the safety of others on the road. Using turn signals communicates your intentions to other drivers, checking mirrors keeps you aware of your surroundings, and maintaining a safe following distance helps prevent collisions.