Final answer:
A traffic officer may direct the movement of vehicles and override normal traffic signs and signals for the sake of safety and law enforcement. Pedestrian safety at intersections and controlling vehicle speed are important reasons for installing traffic signals. While police have authority in traffic matters, it is limited to their official duties.
Step-by-step explanation:
A law enforcement or traffic officer may direct the movement of vehicles. When present, obey the officer's hand signals instead of the normal traffic signals, signs, or pavement markings. Obedience to law enforcement is a clear example of how citizens interact with authority figures. State police and other law enforcement have the jurisdiction to enforce traffic laws and can issue tickets as a consequence of speeding. However, their power is not unlimited, and certain requests, such as personal favors that are outside their official duties, are not within the scope of their authority.
Furthermore, the presence of both pedestrian safety concerns and vehicles that disregard speed limits at an intersection justify the installation of traffic signals. These signals can regulate vehicle speed and provide safe opportunities for pedestrians to cross the street. The proper enforcement of traffic laws by police officers helps ensure public safety and order on the roads.