Texas Transportation Code - TRANSP § 251.155. Restricted Traffic Zones

(a) The commissioners court of a county may adopt regulations establishing a system of traffic control devices in restricted traffic zones on:

(b) A system of traffic control devices adopted under this section must conform to the manual and specifications of the Texas Department of Transportation.

(c) The commissioners court by order entered on its minutes may install and maintain on property to which this section applies any traffic signal light, stop sign, or no-parking sign that the court considers necessary for public safety.