Former Texas state highways

Below is a list and summary of some of the deleted state highways (i.e., those with no current routing) as outlined by the Texas Department of Transportation designation files, indicated by having zero current mileage.
SH 1
State Highway 1 ran from El Paso through Dallas to Texarkana. It was the first highway designated in 1917. In 1926, the United States Highway System was designated, with US 80 colocated from El Paso to Dallas and US 67 from Dallas to Texarkana. In 1939, the dual designations were removed, leaving TX 1 only on a small stretch west of Dallas. This section was redesignated as State Loop 260 in 1952. Since that time, the number "may only be assigned by the Executive Director of the Texas Department of Transportation or the Transportation Commission."
SH 2
State Highway 2 was originally designated in 1917, running from Wichita Falls southeast to Fort Worth. The route then split in two at Waco, with one branch travelling...