Final answer:
4. Means that the traffic the arrow is pointing toward must stop. A red arrow in traffic signals means that traffic must stop and no turns are allowed in the direction the arrow is pointing until the signal changes, ensuring vehicular and pedestrian safety at intersections.
Step-by-step explanation:
The question is about understanding the meaning of traffic signals, specifically the function of a red arrow in traffic control. A red arrow as a traffic signal indicates that the traffic must stop and drivers may not proceed in the direction the arrow is pointing. This has the same implication as a circular red light for the lane where the arrow signal is positioned, meaning no turns in the direction of the arrow are allowed until the signal changes to a green arrow or another permissive signal. It serves as a strict control measure to enhance safety, manage traffic flow, and minimize the risk of accidents, particularly in areas with high pedestrian traffic or reported incidents.
It is crucial to adhere to this traffic rule, as the primary purpose of a red arrow is to prevent conflicts between vehicular and pedestrian traffic, and to ensure that turns are made safely. In locations with high traffic densities, such as intersections near a campus, the presence of a red arrow traffic signal can significantly reduce the speed of vehicles, thereby enhancing the safety for pedestrians crossing the intersection.