Abstract: A barrier device comprising a top wall, a bottom wall, opposed end walls, and, opposed sidewalls each including an elongated, vertically extending curb reveal connected to the bottom wall, a substantially vertically extending upper section connected to the top wall, an angled intermediate section connected at one end to the upper section, and, a substantially horizontally extending step connected between the other end of the intermediate section and the curb reveal. Each wall is formed of a resilient plastic, and the walls are interconnected to define a hollow interior which can be filled with a ballast material such as water, sand, rubber, concrete and the like.