What is the highest numbered highway?
VA’s George Washington Memorial Parkway has the “secret” inventory number of 90005, with the Dulles Access Road and the Colonial Parkway elsewhere in the state being numbered 90004 and 90003 respectively. http://www.vahighways.com/route-log/va800-999.htm VA’s secondary state system is numbered into the five-digit range; currently the higest known number is 10605 in Fairfax County outside Fairfax, the highest-known posted number, and there might be higher numbers because numbers in that range are applied to subdivision streets, and will increase as new streets are built. http://www.vahighways.com/route-log/secondary.htm Previously the highest known numbers were 10354, 10272 and 10350, also in VA’s Fairfax Co. (10272 is Nutley St., designation since early 2001), and before that (in the 50 states) was VA 9968 in Grayson Co. There is a 9991 in PR, and the Bronx River Parkway in Westchester Co., NY is unsigned County Route 9992. For a discussion of the highest-numbered streets in the U.S.,
