Profile: National Signal, Inc. specializes in electronic Directional Display™ panels, variable message signs, speed control products, and other equipment for the traffic control industry. Our Directional Displays™ utilize advance controls without moving switches. The touch sensitive panel eliminates mechanical switches which get wet or break, causing costly down time on equipment. Our controls even monitor the vehicles battery voltage and turn the panel off to avoid a dead battery. Our Directional Displays™ utilize proprietary, low wattage, polycarbonate lamps, as well as very high brightness light emitting diode lamps. We manufacture a complete line of message signs and speed control products.