Tex. Transp. Code § 623.387
Current with legislation from the 2023 Regular and Special Sessions signed by the Governor as of November 21, 2023.
Movement authorized by a permit issued under this subchapter may not exceed the posted speed limit or 55 miles per hour, whichever is less. A violation of this provision constitutes a moving violation.
Tex. Transp. Code § 623.387