Ohio State Route 91 is a north-south highway in Eastern Cuyahoga County. It runs from the Summit/Cuyahoga County Line, near Reminderville, to the Cuyahoga/Lake County Line, near Willoughby Hills. OH St Rt 91 passes through the following towns in Cuyahoga County. Solon Moreland Hills Pepper Pike Mayfield Heights Mayfield OH St Rt 91 is not multi-plexed in Cuyahoga County. OH St Rt 91 crosses the following highways in Cuyahoga County. Ohio State Route 43, at Solon. U.S. Rt. 422, at Solon. Ohio State Route 87, at Moreland Hills. U.S. Rt. 322, at Mayfield Heights.