is provided with a pair of like peripheral recesses designated 46 and 48 which recesses are located adjacent the end terminals of the base member for purposes which will be hereinafter more fully set out superstructure or barricade 12 comprises a pair of spaced hollow plastic posts 50 and 52 the lower portion of each of which is of channel shape and angularly disposed for positioning in that portion of peripheral recesses 46 and 48 defined by angular rear wall 16 the upper portion of posts 50 and 52 lie in a vertical plane when the barricade is in position of use since the barricade 12 of the present invention is intended to serve a visual and not a structural function posts 50 and 52 are provided with transverse weakened zones 54 and 56 located at the juncture between the vertical and angular portions thereof in order to effect ready breaking of the posts at this point in order to prevent damage to vehicles and injury to the vehicle occupants and workers in the event that the barricade is struck barricade 12 further includes a plurality of wavy or undulating rails 58 60 and 62 each of which is provided with spaced transverse weakened zones which are designated 64 66 and 68 it will be noted from a consideration of fig1 that in accordance with one of the objectives of the present invention those portions of rails 58 60 and 62 located at the terminals of the rails and those adjacent perforations 64 66 and 68 extend downwardly at an angle of approximately 15 u00b0 in this way when a sudden and severe force is exerted on the rail ends breakage will occur along weakened zones 64 66 and 68 and the.