A serpentine noise barrier wall containing abutting concrete panels wherein the end panels of the wall are seated on concrete pads and supported in an upright position by angle irons. Adjacent panels are joined together at the shared joint region by connector plates that are mounted in recesses formed in the adjacent panels and are drawn tightly in place by threaded fasteners. Concrete footings are used to support the upper panels of two abutting panels where a pronounced change in grade occurs.