They prevent flying stones from hitting the windshields of following motorists, which reduces the risk of sudden accidents.
For the trailer itself, mud flaps protect the undercarriage from corrosive elements like salt and ice-melting chemicals. Trailer Mudflaps
The Crucial Role of Trailer Mud Flaps: Safety, Compliance, and Longevity They prevent flying stones from hitting the windshields
Legal Requirements for Mud Flaps in the USA - Briargate Supply Trailer Mudflaps
When towing boats or RVs, specialized flaps protect vulnerable front surfaces from paint damage and road spray. 2. Legal Requirements and Compliance
The primary purpose of mud flaps is to minimize the "kick-up" of water, mud, rocks, and other hazardous debris from rotating tires.