Abstract: A barricade assembly is made up from a plurality of panel units which can be secured together to provide a barricade of adjustable height. Each panel unit has spaced parallel side legs and a planar cross member extending transversely between the legs. A hinge mechanism allows two panel units to be releasably hinged together at their upper ends so that they can be angled relative to one another in a free-standing, open position. Two or more panel units can also be releasably secured together in vertical alignment to adjust the height of the assembly.