This LED flashing stop sign has DG reflective sheeting. The sign conforms to the specifications of the Federal Highway Administration (FHWA) as set forth by the MUTCD. The stop sign uses innovative LED technology with a series of synchronized high intensity LEDs. The LED lights extend the range of visibility of the sign during both day and night and in all weather conditions. The addition of flashing LEDs also increases driver awareness for added safety. Free shipping on this item.