Abstract: A barrier to vehicular passage is described. The barrier is cast from dense, heavy material and has a frusto-pyramidal shape of six surfaces. The barrier forms (A) a top and a bottom surface, which are opposing and substantially parallel to each other and wherein the area of the bottom surface is greater than the area of the top surface, and (B) four non-vertical side surfaces wherein the angle of inclination from vertical of at least one side surface is greater than the angle of inclination from vertical of the opposing side surface. Methods of use of the barrier or a plurality of barriers are also described.