What is the impact of heavy rain on large commercial vehicles?

Heavy rain significantly affects the handling and performance of large commercial vehicles. One of the main concerns during such weather conditions is the increased stopping distance. When roads are wet, the friction between the tires and the pavement is reduced, requiring more distance for a vehicle to come to a complete stop. This reduced traction increases the risk of hydroplaning, where the vehicle's tires lose contact with the road surface and ride on the surface water, making it difficult to steer and control the vehicle.

In addition, large commercial vehicles, due to their weight and size, take longer to stop compared to smaller vehicles. Therefore, drivers must be particularly cautious during heavy rain to maintain a safe stopping distance and be aware of increased risks associated with reduced traction.

The other choices imply either an improvement in stopping distance, no impact on stopping distance, or improved traction, all of which are contrary to the effects of heavy rainfall on vehicle dynamics.