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The current AASHTO policy on U.S. highways says routes with directional suffixes and single state US routes should be renumbered or decommissioned. However, the locals and traveling public are used to the existing signage, and would be confused if such renumberings took place. Former and existing split routes are listed at http://www.us-highways.com/usdiv.htm . Mar 4, 2002 7.
