(a) 
The following words, terms and phrases, when used in this article, shall have the meanings ascribed to them in this subsection, except where the context clearly indicates a different meaning:
Motor vehicle
means every vehicle which is self-propelled.
Trailer
means every vehicle with or without motive power, designed for carrying persons or property and being drawn by a motor vehicle.
(b) 
Under this article, any such vehicle or trailer as herein defined shall be deemed to be parked when the same is standing with or without the operator occupying the same without regard to whether the engine is running or the engine is not running.
The director of the department of public works is authorized and instructed to post and maintain no parking signs within the city, displaying the no parking zone on the road, street and highway as provided by this article to vehicular traffic along such road, street and highway.
Whenever any police officer finds a vehicle standing upon that portion of the roadway in violation of this Code, such officer is hereby authorized to move such vehicle, or require the driver or other person in charge of the vehicle to move same, to a position outside the restricted area.
Unless otherwise provided therein, any person convicted of the violation of any portion of this article shall be punished within the limits provided in V.T.C.A., Transportation Code § 542.401. Each particular act of violation of this article shall constitute a separate offense, punishable as herein prescribed.
No person in charge of said vehicle and/or trailer, no person in charge of operating said vehicle and/or trailer, and no person in whose name said vehicle and/or trailer is registered shall allow or permit such vehicle and/or trailer to be parked in violation of this article. The same is hereby declared to be a nuisance per se and the fact that such vehicle and/or trailer is unattended or unoccupied by said persons shall be prima facie evidence that the person in charge, the operator thereof and the owner thereof unlawfully and knowingly so parked said vehicle and/or trailer.