The purpose of this article is to permit signs that will not, by reason of their size, location, construction or manner of display, endanger the public safety of individuals, confuse, mislead or obstruct the vision necessary for traffic safety or otherwise endanger public health, safety, morals and general welfare; to permit and regulate signs in such a way as to support and complement the purpose of this chapter; to prevent the proliferation of signs which detract from the appreciation of the landscape; and to preserve and enhance the attractiveness of Dorchester County.