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Where you don't see these or any other speed limit signs on Sheridan County Roads starting July 1st, it means that: Effective July 1, 2011, the new statutory speed limits for County roads are: Residential district and subdivision roads - 30 mph; Unpaved roads - 55 mph (unless posted otherwise); Paved roads - 65 mph (unless posted otherwise).
See:
http://www.sheridancounty.com/pu...
It is not just Sheridan County but the entire State - see: http://www.dot.state.wy.us/wydot/
