Chapter 2: Texas Highway Trunk System
Section 1: Overview
Purpose of the Texas Highway Trunk System
The Texas Highway Trunk System (Trunk System) is a network
of rural divided highways that complements and includes the rural
portion of the Interstate Highway System. The minimal design criteria
for this network specify that each highway should be at least a
four-lane divided facility. The Trunk System serves as a principal
connector for all Texas cities with over 20,000 population as well
as major ports and points of entry to the state. The total mileage
of the Trunk System, as stated in TxDOT Minute Order 910209, is
limited to 11,500 miles.
Laws and Regulations regarding the Texas Highway Trunk System
Route selection criteria for the Trunk System are found in
the Texas Administrative Code (TAC), Title 43, Chapter 16, Subchapter
B, Section 16.56 (
).
Texas Highway Trunk System Update Frequency
The 1990 commission minute order adopting the Trunk System
included a provision that the Trunk System be reviewed every four
years to determine if revisions are needed.
Updates to the Trunk System mileage automatically occur when
urbanized areas expand as a result of the decennial Census, reducing
the number of miles on the system.
Texas Highway Trunk System Location
The statewide planning map has a layer for the Trunk System.
The statewide planning map is located at
.