What is the primary purpose of signs indicating "No stopping"?

The primary purpose of signs indicating "No stopping" is to maintain traffic flow. When a vehicle stops, even briefly, it can disrupt the movement of other vehicles on the road, causing congestion or potentially leading to accidents. These signs are strategically placed in areas where stopping would impede the smooth transit of traffic, such as busy intersections, high-traffic roadways, or locations where stopping could create hazards. Maintaining an uninterrupted flow is crucial for the safety and efficiency of road use, especially in urban environments where traffic density is high.

The other choices suggest purposes that do not align with the intent of "No stopping" signs. For example, allowing brief pauses would counteract the very goal of keeping traffic moving effectively. Similarly, designating loading zones would imply a need for vehicles to stop safely, which contradicts the nature of a "No stopping" directive. Limiting access for large vehicles, although important in certain contexts, is not the primary concern addressed by this particular signage. The focus remains solely on ensuring that vehicles continue to move smoothly without unnecessary interruptions.