Final answer:
Regulatory signs, including white signs, are indeed used to control traffic flow and movement. They convey rules such as speed limits and stopping requirements, and are essential for road safety. A traffic signal sign, for instance, alerts drivers to slow down and prepare to stop at intersections.
Step-by-step explanation:
The statement that regulatory (white) signs are used to control the movement and flow of traffic is true. These signs are critical for maintaining safe and efficient transportation by informing drivers of the laws and regulations they must follow. Regulatory signs include speed limit signs, stop signs, yield signs, and traffic signal ahead signs. The presence of a traffic signal, for example, requires vehicles to slow down when approaching an intersection, reducing the possibility for accidents and ensuring an orderly flow of traffic. Without these signs, drivers may not be aware of speed limits or when they are required to yield or stop, potentially leading to dangerous driving behaviors and increased accidents.
For instance, when vehicles speed through intersections without regard to the posted speed limit, a properly placed traffic signal sign can alert drivers in advance that they must prepare to stop, encouraging them to reduce their speed. Similarly, stop signs at intersections ensure that drivers come to a complete halt before proceeding, which is essential for preventing collisions. It is crucial for all drivers to understand and comply with these signs, as they are put in place to ensure the safety of everyone on the road.