National Signal has been designing and building traffic control products since the 1990’s but its roots extend to the first arrow boards made in the 1970’s. Over the years we have introduced some unique innovations such as the first arrow board control with membrane switches and vehicle battery monitoring. We now have an extensive product offering which includes state of the art message signs and portable solar/hybrid light towers. With our ability to design and manufacture everything in our California facility we continue to build exciting new products that are shipped all over the world and represent the best of American quality and support.