Portable Changeable Message, Speed Trailers, Camera Trailers & Mobile Power Plant

American Signal Company (AMSIG) designs and manufactures advanced portable traffic and safety equipment used nationwide by contractors, departments of transportation, and municipalities. Since its founding, the company has specialized in portable changeable message signs, speed trailers, camera trailers, and mobile power plants. Each trailer-mounted, solar-powered LED system is built for reliability and engineered to meet MUTCD standards, supporting traffic control, construction, public safety, and special event operations with proven performance.