Section 21-1404 - Traffic to comply with signs, orders, etc(a) Traffic using any Authority highway shall obey any lawful sign.(b) Traffic using any Authority highway shall obey any lawful order of any authorized employee of the Authority highway.(c) Traffic using any Authority highway shall obey any lawful signal of any authorized employee of the Authority highway.(d) Traffic using any Authority highway shall obey any lawful direction by voice, sign, or hand of any authorized employee of the Authority highway.