The Texas Trunk System (TRUNK) was established in 1990 by the Texas Transportation Commission to construct a network of four- lane divided rural highways. The original system was 10,050 miles including 3, 233 miles of Interstate Highway System. Another 475 miles were added in 2001. TRUNK represents 13% of state highway systems.

The purpose of this initiative was to:

Improve rural mobility;
Connect major activity centers;
Provide access to ports of entry into Texas; and
Connect with principal highways from adjacent states.

Refer to the following TxDOT reports for more information and criteria used for selection:

Statewide Long-Range Transportation Plan 2035
, Chapter 5: Priority Corridors (2010); and
Statewide and Rural Connectivity Program
(2023).