Ohio State Route 109 (SR 109) is a designated state highway in the U.S. state of Ohio. The route is maintained by the Ohio Department of Transportation (ODOT) and lies in the northwestern portion of the state, generally following an east‑west alignment. As a component of Ohio’s state highway system, SR 109 serves local traffic, providing connections between rural communities and larger arterial roadways in the region. Detailed information regarding its exact length, termini, or historical development is not available within the current reliable encyclopedic sources.
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