Wisconsin's County Road Letter Mystery
2025-08-09
Have you noticed the alphabet soup of letters marking Wisconsin's scenic county roads? BB, CV, N, SS – why letters instead of numbers? Over a century ago, Wisconsin innovatively used letters to distinguish county roads from state highways, streamlining maintenance and preventing duplication of efforts. This system, initiated in 1917, has evolved, now using double and multiple letter combinations as the single letters ran out. The Wisconsin County Highway Association, founded in 1911, is proud of this historical system and their continuing leadership in road innovation.
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road numbering