South Dakota Adopt-A-Highway signs. Photo courtesy Argus LeaderSouth Dakota’s Adopt-A-Highway signs brought national attention to the state 25 years ago this week — but not for the beauty of the state’s litter-free roadways.Instead, according to the Aug. 13, 2001, edition of the Rapid City Journal, the nation waited to see if the state would abolish the volunteer cleanup program after the South Dakota Department of Transportation turned down an …
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