SR 50 was the route that connected Lebanon to the community of Abe within Newberry Township, Miami County from 1923 to 1926.

[1][4] Originally, the route ran from downtown Dayton to SR 54 (currently US 33) in Willshire.

[2] The route was replaced in the next year by SR 4 due to the inclusion of US 52 in Ohio.

From 1923 through 1928, the route began in Norwalk, traveled northeast to Berlinsville, and continued east to Elyria.

[1][10] In 1929, the route began in Milan but within the next year, it was extended west to Bellevue.

[13] SR 62 was a route that connected Galion and Oak Harbor via Bucyrus and Fremont.

The route followed the same alignment for its entire history from 1923 through 1931 when it was renumbered to SR 19 in 1931 due to the addition of US 62 in Ohio.

[1][5][14] SR 63 was a route across northwestern Ohio between Carey and Sylvania by way of Fostoria, Perrysburg, and Maumee.

Between 1923 and 1925, the route ran from Washington Court House to Covington, but was extended south in 1926 to a point near Cynthiana.

[1][22] Two years later, the route's eastern terminus was moved to just east of Peebles in Franklin Township.

The tunnel built in 1866 was bypassed in 1960 and currently serves as a tourist attraction and a haunted house around Halloween.

[1][27] At the time of its creation in 1923, SR 76 only ran from New Concord to Wooster and followed a more westerly alignment between Coshocton and Millersburg.

[1] By 1927, the route was moved to the modern-day SR 83 alignment between Coshocton and Millersburg and extended south to Beverly.

[1][2] Originally, the route ran from its western terminus at Brentwood Lake between Grafton and Elyria to its eastern end in Twinsburg.

Its first alignment, created in 1923 over the former route of SR 476 started just south of Ashtabula, headed east through Sheffield and ended at the Pennsylvania state line in Monroe Township.

[9][28] The final routing of SR 83 started in southern Ashtabula and traveled east (on an alignment different than the 1923 route) to Kelloggsville before jogging south to Monroe Center ending at SR 7.

[9] By 1958, SR 83 was removed from the state highway system and the roads on which it traveled were transferred to Ashtabula County.

The route followed Ghent Road and served as a shortcut between Akron and Parma by bypassing Montrose.

The route, which existed from 1923 through 1936, was replaced by SR 176 when it was extended south to Akron.

[1][28] At the time of its designation, the route ran from Delphos to Republic by way of Fort Jennings, Findlay, and Tiffin.

[1][2] The route ran from the Indiana state line in Harrison Township, Van Wert County to Ottawa.

SR 112 was a cancelled freeway named the Downtown Distributor that would have run from Interstate 75 north of the current Anthony Wayne Trail terminus through downtown, along the banks of the Maumee River.

On a county map from 1973,[43] ramps off I-75 were to have begun a freeway marked as State Route 112.

It was planned to run to the Maumee River, through the historic St. Patrick's Catholic Church.

[citation needed] It would have ended at the Summit Street interchange on Interstate 280, and would have had a spur providing a freeway connection to the Anthony Wayne Bridge.

The route headed southeast from the unincorporated community of Scipio through Venice and Dunlap before ending at SR 9 in Cincinnati.

The route existed from 1923 until 1926 and traveled between the Indiana state line in Harrison to Cheviot, a northwest suburb of Cincinnati, at SR 7.