What type of traffic control is used to change traffic signals?

• A. Manual Control
• B. Automatic Control
• C. Remote Control
• D. Wireless Control

Answer: (A)

This question is about who physically changes the traffic signal at an intersection. Manual control means a person operates the signal directly—using a switch or handheld controller at the cabinet to set or override the cycle. This is the method used when a human needs to alter the signal on the spot, such as for police directing traffic, emergency situations, or maintenance.

Automatic control runs the normal cycle based on timers or sensors, so the signal changes without a person actively making the switch. Remote or wireless control involve adjusting the signals from a distance, typically from a central control facility rather than at the intersection itself. Because the question asks which method is used to change the signals, manual control is the correct choice.