The public safety director or designee is authorized to erect signs, barricades, and other structures and to paint marks or other directions upon the entry ways and streets on campus and upon the various parking lots owned or operated by the college. Such signs, barricades, structures, markings, and directions shall be made and placed as to best effectuate the objectives of these rules and regulations, in the opinion of the vice president for administration or his or her designee. Drivers of vehicles shall observe and obey the signs, barricades, structures, markings, and directions erected pursuant to this section. Drivers shall also comply with the directions from public safety personnel including commissioned law enforcement officers in the control and regulation of traffic.