What is the main disadvantage of driving a heavy vehicle?

Answer: B — Longer stopping distances

Driving a heavy vehicle has various implications for safety and operational performance, and one of the primary disadvantages is longer stopping distances. Heavy vehicles possess greater mass, which leads to a proportionally increased momentum compared to lighter vehicles. When these vehicles travel at high speeds, the kinetic energy they generate needs to be dissipated during braking, making it essential for drivers of heavy vehicles to account for the additional distance required to stop safely. Under normal operating conditions, the weight and size of a heavy vehicle mean that it takes significantly longer to come to a complete stop compared to standard passenger vehicles. This requires drivers to maintain greater following distances and be more aware of their surroundings, especially in situations that necessitate sudden stops, such as traffic conditions or unexpected obstacles. Understanding this characteristic helps drivers effectively manage their speed and braking to ensure safe navigation on the road.