In 1979, the parts of the route that had been signed as SR 156 were re-designated as SR 108, which extended this designation from SR 20 all the way up to SR 52 in Lumkpin County.
In 1979, parts of the route that had been designated as SR 156 were re-designated as SR 108, extending this designation from SR 20 all the way up to SR 52 in Lumkpin County.