(a) Except as provided by Subsection (c), if an offense under this subtitle, other than an offense under Chapter 548 or 552 or § 545.412 or 545.413, is committed in a construction or maintenance work zone when workers are present and any written notice to appear issued for the offense states on its face that workers were present when the offense was committed:
(1) the minimum fine applicable to the offense is twice the minimum fine that would be applicable to the offense if it were committed outside a construction or maintenance work zone; and
(2) the maximum fine applicable to the offense is twice the maximum fine that would be applicable to the offense if it were committed outside a construction or maintenance work zone.
(b) In this section, “construction or maintenance work zone” has the meaning assigned by § 472.022.

(c) The fine prescribed by Subsection (a) applies to a violation of a prima facie speed limit authorized by Subchapter H, Chapter 545, only if the construction or maintenance work zone is marked by a sign indicating the applicable maximum lawful speed.