SH 146-D to South Shady Lane in La Porte.

It is known as Judson Road for most of its length, except for the southernmost quarter mile, where it is known as High Street.

Spur 503 was designated on March 1, 1972, from then-proposed US 75 south of Denison east 1.5 miles (2.4 km) to then-present US 75 (later Bus.

On December 22, 1994, the road was extended to US 69, replacing a portion of Bus.

It was designated on April 3, 1972, from the New Mexico state line at Glenrio, east and north 0.61 miles (0.98 km) to I-40, along a portion of an old alignment of US 66.

Spur 515 was designated on February 28, 1973, on the current route as a replacement of a section of SH 105.

Spur 535 was designated on May 23, 1977, from SH 27, 1.4 miles (2.3 km) south of Kerrville, southeast 1.3 miles (2.1 km) to Kerrville Airport.

On September 26, 1979, Spur 535 was relocated to its current location due to construction at the airport.

[15] The Spur 537 designation, along with those of several other routes in Bexar County, was cancelled on December 18, 2014; control was returned to the city of San Antonio as part of TxDOT's San Antonio turnback program, which gave 21.8 miles (35.1 km) of roads to the city.

[20][21] Spur 544 was designated on June 18, 1996, on the current route as a replacement of Bus.

The route is an unsigned portion of the Hardy Toll Road.

Spur 553 was cancelled on November 18, 1999, and became a portion of SH 121 when it was rerouted.

Spur 559 was designated on January 28, 1987, from I-345 southeast 1.4 miles (2.3 km) to I-45 along an old routing of US 75.

On June 25, 1991, Spur 559 was cancelled and returned to the city of Dallas.

Spur 572 was designated on October 28, 1987, as a replacement for SH 149, which was rerouted along Loop 436 west of Carthage.

The highway runs to the north, paralleling both I-35 and a line of the Missouri Pacific Railroad, crossing the rail line north of Derby near County Road 3410.

South of County Road 3201, Spur 581 passes by McKinley Field before entering Pearsall.

Just north of the Pearsall city limits, the highway intersects FM 1582.

Its mileage was transferred from US 81 when that highway was decommissioned south of Fort Worth.

Spur 589 was designated om March 28, 1989, from US 281 to US 59 in George West along an old routing of US 59.

It runs from I-30, 1.4 miles (2.3 km) west of FM 560, to US 82 and serves the Red River Army Depot.

Its eastern terminus is at an at-grade intersection with US 83 near the buildings of the Guthrie Common School District.

[44] Spur 729 was designated on July 26, 2007, after TxDOT rerouted US 82/SH 114 around Guthrie.

Originally, US 82 entered Guthrie from the west and was duplexed with US 83 southbound for approximately 1 mile (1.6 km) before the two routes separated past the South Wichita River bridge.

The concurrency was eliminated with the construction of the US 82 bypass to the west of Guthrie and the upgrading of the southern intersection of the two highways to an interchange.

Spur 729 is a section of the former US 82 into Guthrie, while the remaining portion of the former route was deleted from the state highway system.

[43][45] Previously, the roadway extended beyond the current western terminus and functioned as a ramp to westbound US 82; this ramp was eventually obliterated, as originally proposed by TxDOT to AASHTO, though its footprint is still visible past the barricades and fencing.

The number was chosen to honor the NCAA championship won by the 1965–66 Texas Western Miners men's basketball team as the road passes the university (now known as The University of Texas at El Paso).