Sound barrier for highway and other traffic

A barrier assembly adapted to be disposed along a traffic lane comprising:

• a lower road-barrier portion disposed along the ground along said lane and engageable with a vehicle to limit the tendency of said vehicle to leave said lane, said road-barrier portion being formed along at least three sides as a sheet-metal profile and being filled with a foamed synthetic resin, said road-barrier portion extending to the ground and having a bottom edge lying longitudinally therealong and an upper edge, said road-barrier portion being of greater width at an upper one of said edges than at the bottom edge and progressively widening smoothly from said bottom edge toward said upper edge, said road-barrier portion being symmetrical to a vertical longitudinal median plane therethrough;
• post means for anchoring said barrier portion to the ground, said post means consisting of posts completely concealed in said road-barrier portion and in the ground;
• and
• a sound-barrier portion at least as high as said road-barrier portion and surmounting said road-barrier portion while being connected thereto, said sound-barrier portion consisting of a hollow sheet-metal profile filled with a foamed synthetic resin material, said sound-barrier portion being narrower than said road barrier portion at least in the region of said upper edge.