Abstract: The specification discloses a portable traffic control sign comprising a stand capable of resting on a support surface, at least one mast portion extending upwardly from the stand, the at least one mast portion having a bottom and a top, a substantially hollow interior and an outside diameter of less than approximately 1.75 inches, at least one sign panel connected to the at least one mast portion, and a reinforcing member fixedly disposed in the hollow interior of each at least one mast portion, the reinforcing member having a length sufficient to reinforce the at least one mast portion proximate the area of probable impact by a motor vehicle.