Abstract: An erectable and collapsible warning signal reflector assembly includes a pair of crossed arms that are pivotally connected to one another at their crossing point and are further attached to a vertical post stand at the same point. An elongated hollow box is used as a stand. The bottom of the vertical post is positioned into an opening in a top lid cover of the elongated box stand. When the crossed arms and post are rotated along the same plane, the entire assembly can be fit into the elongated box for storage purposes. Electrically powered lights are located on at least one side of each of the arms. The lights can be powered by a battery and switch inside each of the arms. Alternatively, the lights can be powered by an adapter plug that can be inserted into a conventional cigarette lighter. Alternatively, the lights can be reflector covers.