 The Ohio Department of Transportation ( <unk> ) conducts surveys throughout its highway system to determine traffic volume . This is most commonly expressed as the average annual daily traffic ( AADT ) , or the measure of traffic volume for any average day of the year . In 2010 , <unk> determined that an average of 710 vehicles per day traveled along the length of SR 319 . This state highway is not included as a part of the National Highway System , a system of highways identified as being most important for the economy , mobility and defense of the nation . 
