CDL Tanker Endorsement Practice Exam

How does the stopping distance of empty trucks generally compare to full ones?

1. They stop shorter

2. They require longer stopping distances

3. They stop at the same distance

4. They stop with less force

The correct answer is: They require longer stopping distances

Empty trucks generally require longer stopping distances compared to full trucks due to several factors related to weight distribution and traction. When a truck is loaded, its weight increases the friction between the tires and the road, providing better traction. This increased traction allows for more effective braking. In contrast, an empty truck is lighter, which can lead to reduced tire grip on the road surface. This phenomenon causes the wheels to lock up more easily under heavy braking conditions, resulting in a longer stopping distance. Additionally, the dynamics of an empty truck can lead to a greater likelihood of skidding or loss of control, further extending the distance it takes to come to a complete stop. Understanding this concept is crucial for safe driving practices, particularly in situations where quick stopping may be required, such as in urban environments or during inclement weather. Properly anticipating the longer stopping distance of empty trucks can help drivers maintain safer travel distances and make more informed decisions behind the wheel.