 After passing a radio tower and a gas processing plan, the highway ends at a stop-controlled intersection with U.S. Route 183.SH 112 was originally designated on August 11, 1925 as a route from Karnes City north to Nixon then northeast to near Gonzales.. On July 17, 1934, the section south of Nixon was transferred to SH 29.On January 19, 1935, this section was changed back to SH 112.