 = Ohio State Route 319 = 
 
 State Route 319 ( SR 319 ) is a very short , two @-@ lane state highway in the western portion of the U.S. state of Ohio . A spur route , SR 319 has its western terminus at an abandoned railroad grade just west of Washington Street in the village of Burkettsville . Its eastern terminus is 0 @.@ 56 miles ( 0 @.@ 90 km ) to the east of its western terminus at its junction with SR 118 . SR 319 was established in the early 1930s . It started out as a much longer highway , but earlier segments would become a part of SR 118 in the late 1930s . 
 
 = = Route description = = 
 
 For its entire length , SR 319 runs along the boundary between Darke County on the south side and Mercer County on the north side . SR 319 begins in downtown Burkettsville at a former railroad grade just west of Washington Street . Known as Main Street within Burkettsville , the route runs due east through the village 's central business district prior to entering a residential area where it intersects a few side streets . After leaving the village of Burkettsville , SR 319 becomes the boundary between Darke County 's Allen Township and Mercer County 's Granville Township . After a short distance through farmland , the highway comes to an end as it arrives at its junction with SR 118 . Continuing east after the route terminates is Darke – Mercer County Line Road . 
 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 . 
 
 = = History = = 
 
 SR 319 was assigned in 1932 . Originally , SR 319 included the entirety of the current route , along with the stretch of SR 118 from SR 319 north to SR 219 in <unk> . In 1935 , SR 319 was extended further north along the present alignment of SR 118 to what was then designated as SR 32 , now a part of SR 29 , west of <unk> . Two years later , SR 118 was extended south from its former southern terminus in <unk> to its present southern terminus in <unk> . Consequently , the entirety of what was the north – south stretch of SR 319 prior to that time became a part of the new extension of SR 118 . In turn , SR 319 became the short spur route that it is today . 
 
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