What is the maximum height for mud flaps above the roadway?

The maximum height for mud flaps above the roadway is set at 12 inches to ensure that they effectively reduce the spray and debris that can be thrown up by the vehicle’s tires. This height allows the mud flaps to efficiently prevent water, mud, and other debris from impacting other vehicles on the road, thereby enhancing safety for both the vehicle and surrounding drivers.

Having mud flaps positioned correctly at or below this height is crucial, as it strikes a balance between functionality and compliance with safety regulations. It ensures that the mud flaps serve their intended purpose without hindrance from vehicle design elements. Some regulations might allow for minor variations based on vehicle type or specific circumstances, but 12 inches is the universally accepted standard that aligns with state vehicle safety inspections.