The expressway ends at an intersection with State Highway 30 and runs through rural areas before reaching the town of Trinity.

[3] On August 21, 1923, SH 19 was pared back significantly, eliminating the section north of Grand Saline.

On April 15, 1940, SH 19 was extended north to Sulphur Springs, a modification of the much longer proposed extension that was not designated.

On September 26, 1945, SH 19 was routed over FM 647 from 1 mile south of the Hopkins County line through Emory to Dunbar.

On August 24, 1960, it was extended northward to its original starting point of Paris and again to the south to Huntsville, replacing a portion of SH 45.

[8] On March 19, 1923, it was extended east to Galveston and west to Ganado, with the old route to Palacios being changed to SH 19B.

SH 19-J continues south through the town square, which is the location of the Henderson County Courthouse and also comprises the junction with Bus.

For a short distance, the business route is paralleled by FM 2494, which takes South Praireville Street, before cutting east, away from Bus.

The business route curves southeast, still following Palestine Street, past the northern terminus of FM 59 at West Cayuga Drive, before reaching its southern terminus at the Jim Robinson Loop, where SH 19 splits from Loop 7 and serves as a continuation of the route.