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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 ManagementTraffic 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.