CDL General Knowledge Practice Test

Turn signals are an essential safety feature when driving, and they should be used at least 100 feet before turning or changing lanes. This advance signaling is crucial because it provides other drivers and pedestrians with sufficient time to react and adjust their movements accordingly. By indicating your intentions well in advance, you contribute to safer driving conditions, helping to prevent accidents and ensure a smoother flow of traffic. Using turn signals only when already in the intersection or neglecting to signal when making left or right turns does not allow other road users to anticipate your actions. Additionally, failing to signal when changing lanes can lead to dangerous situations, especially in busy driving environments. Therefore, the requirement to signal at least 100 feet before any turn or lane change is a standard practice aimed at promoting safety on the roads.