 In 1921, SR 55 was established along a route from Louvale, at an intersection with SR 1 to Dawson, and SR 50 was established along a stretch of highway from Dawson in the west, to at least as far as Waynesville, at an intersection with SR 27, in the east.Nearly all of SR 55, and all of that stretch of SR 50, were eventually utilized by SR 520.By 1926, a portion of SR 1 southeast of Columbus and a portion of SR 50 west of Sylvester were paved.