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It went under major changes in 1931, with its western terminus being shifted to the New Hampshire state line and all of its eastern routing becoming part of modern SR 4, SR 5, SR 11, SR 205, and U.S. Route 202, resulting in the short alignment it has today.
Although they are not directly connected to one another, they are linked by their parent highway, Maine State Route 4, as well as U.S. Route 202, which runs concurrently with Route 4 during this stretch.