From Palestine to Linden, SH 155 is part of the Blue Star Memorial Highway.

From Tyler the route continues to the junction of US 271 and SH 31; and then from a point on US 271 northeast of Tyler, northeastward via Big Sandy, Gilmer, Avinger to US 59 (Future I-369) at Linden, a total approximate distance of 123.4 miles (198.6 km).

[2][3] The route is concurrent with US 271 on two separate sections in the city of Tyler and the town of Gilmer.

For many years, one of the sole remaining two-lane segments and a source of congestion was a 9.5-mile (15.3 km) stretch extending from Frankston to Pert.

[4] On September 26, 1939, the section from Marshall to Gilmer was transferred to SH 154 when it was extended east from Quitman.