Air horns are a valuable safety device for any type of truck: tow trucks, siem trailers, big rigs, dump trucks, and many more. They enable the trucker to warn other drivers of their approach and are available in a variety of sizes and styles. Most air horns are designed for use on vehicles with air brakes although an air compressor mounted in the vehicle can provide the necessary power to sound the air horn. Train horns are fast becoming popular and are available in a variety of styles to fit on different areas on the truck. These train horns provide an extra loud sound and command attention. Another loud option is the train whistle “air horn”.