No operator shall open the door of a parked motor vehicle on the side adjacent to moving vehicular traffic unless it is reasonably safe to do so. A violation of this section shall constitute a traffic infraction punishable by a fine of not more than $50. No demerit points shall be awarded by the Commissioner for a violation of this section. The provisions of this section shall not apply to any law-enforcement officer, firefighter, or emergency medical services personnel engaged in the performance of his duties.