Emergency vehicles are often outfitted with a strobe system that sends a light pulse to a sensor mounted on traffic signal poles. Once the strobe is initiated in the emergency vehicle, the sensors see this light pulse and change the light to green, allowing the emergency vehicle to pass through the intersection.
Just as permanent intersections can be outfitted with this feature, our portables can too! Whether it is audible pre-emption, strobe or infrared, our portable traffic signals are compatible when the right components are added. We offer all kinds of pre-emption sensors for our units, the biggest element to consider is what type of trandmitting (audible, strobe, or infrared) system your local emergency vehicles are already outfitted with.