On October 28, 1987, a loop around Carthage was completed, with SH 149 being routed around the western side of town along Loop 436. The old routing that entered Carthage was re-designated Spur 572.
On October 28, 1987, a loop around Carthage was established, with SH 149 being rerouted along Loop 436 on the western side of town. The previous route into Carthage was re-designated as Spur 572.