 At the same time, the portion of SR 136 that extends west from SR 183 had been graded, and was signed as SR 154.Just 3 months later, the entire stretch of SR 183 had been improved to feature hard surface, and the full length of the route had been re-signed as SR 183, meaning that at the time SR 136 terminated at the intersection of the two routes.It was early in 1942 when the route's northern terminus, which had been signed as SR 43, was designated as SR 52.