State Route 192 Spur was a spur route of SR 192 that existed partially in the citylimits of Twin City. At least as early as 1940, this roadway was established as part of the SR 192 mainline. Between the beginning of 1953 and the beginning of 1975, SR 192 was shifted off this road, and onto a more western routing through the city. All of its former path that was not concurrent with SR 23 was redesignated as SR 192 Spur. Between the beginning of 1995 and the beginning of 2011, this spur route was decommissioned.