Tex. Transportation Code § 372.112

(a) A peace officer may detain a motor vehicle observed by the officer to be operated in violation of an order under Section 372.110(a) and may direct the impoundment of the vehicle if:

(1) the vehicle was previously operated on a toll project in violation of an order issued under Section 372.110(a); and

(2) personal notice to the registered owner of the vehicle of the toll project entity's intent to have the vehicle impounded on a second or subsequent violation of Section 372.110(a) was provided:

(A) at the time of the hearing under Section 372.107;

(B) at the time of the previous traffic stop involving a violation of Section 372.110(a); or

(C) by personal service.

(b) A vehicle impounded under this section may be released after:

(1) payment by or on behalf of the registered owner of all towing, storage, and impoundment charges; and

(2) a determination by the toll project entity that all unpaid tolls and fees owed to the entity by the registered owner are paid or are otherwise addressed to the satisfaction of the toll project entity in the toll project entity's sole discretion.

(c) For the purposes of Section 2303.155(b)(4), Occupations Code, fees required to be submitted to a governmental entity include an amount for unpaid tolls and fees owed by the registered owner of an impounded vehicle as set out in timely written notice given by the toll project entity to the operator of the vehicle storage facility where the vehicle is impounded. The toll project entity may set out in that notice an amount less than all unpaid tolls and fees owed by the registered owner without releasing the registered owner from liability under any other law for the full amount of unpaid tolls and fees.