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​D07 Traffic Engineering
Mary Hoy,P.E.
District Planning Department Traffic Engineer
Phone: (937) 497-6838
Justin Yoh,P.E.
District Highway Management Traffic Engineer
Phone: (937) 497-6897

This site offers general information on traffic control devices such as when they should be used, what sort of criteria determines if they are needed, and what impact they may have to traffic safety and operation.