1962 Ohio state highway renumbering
http://dbpedia.org/resource/1962_Ohio_state_highway_renumbering
In 1962, the Ohio Department of Highways implemented the system of Interstate Highways that had been approved by the states in 1956. The State Route numbers 70, 71, 74, 75, 77, 80, 90, 270, 271, 275, 277, 280, 290, 675, and 680 conflicted with new designations, so the State Routes with those numbers were renumbered. However, there is no Interstate 290 in Ohio anymore, so 290 is a possible state route number again.
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1962 Ohio state highway renumbering
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In 1962, the Ohio Department of Highways implemented the system of Interstate Highways that had been approved by the states in 1956. The State Route numbers 70, 71, 74, 75, 77, 80, 90, 270, 271, 275, 277, 280, 290, 675, and 680 conflicted with new designations, so the State Routes with those numbers were renumbered. However, there is no Interstate 290 in Ohio anymore, so 290 is a possible state route number again.
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6993