Route marker for Ohio Byway, sign M8-H3, retired on July 15, 2022, in favor of M8-H4. <a rel="nofollow" class="external autonumber" href="https://www.dot.state.oh.us/roadway/omutcd/Documents/2012_OMUTCD_Known_Errors_071522.pdf#page=5">[1]</a>
Ohio Department of Transportation
<i>Ohio Manual on Uniform Traffic Control Devices</i>