Pedestrians and drivers of vehicles shall obey regulatory signs, markings, and barricades placed by the director. Pedestrians and drivers of vehicles shall also comply with directions given in the control and regulation of traffic by uniformed state patrol officers and department of enterprise services parking controllers. No person shall move or alter any sign, barricade or other structure used for traffic and/or parking regulation, including painted stripes or marking utilized in traffic and parking control, without the authorization of the director.