It was planned to run from Cincinnati to Conneaut and connect with an extension built across the panhandle of Pennsylvania to the New York State Thruway.
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The present day route of what was once planned as SR 1 is Interstate 71 from Cincinnati to just northeast of Medina, Interstate 271 for its entire length from northeast of Medina to Willoughby Hills, and Interstate 90 from Willoughby Hills to the Pennsylvania state line at Conneaut.
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