What is the primary function of a trailer's mud flaps?

The primary function of a trailer's mud flaps is to prevent debris and water from being thrown by the tires. When a vehicle is in motion, especially in wet or muddy conditions, the tires can kick up gravel, mud, and water, which can then be projected into the air. This not only poses a hazard to other vehicles on the road but can cause damage to the trailer itself and create visibility issues for drivers. By using mud flaps, this debris is contained, mitigating potential risks to both the trailer and surrounding traffic.

This function significantly contributes to road safety, as it helps keep the roadway clear of projectiles and reduces the risk of accidents caused by impaired visibility. Additionally, protecting the vehicle from road grit minimizes wear and tear, extending the lifespan of the trailer and its components.