When is a driver allowed to stop in a "no standing" zone?

Answer: B — When discharging or picking up passengers

In a "no standing" zone, a driver is permitted to stop when discharging or picking up passengers. This allowance is made to facilitate the safe and efficient movement of people, particularly in areas where stopping for extended periods could obstruct traffic flow or create safety hazards. The emphasis is on ensuring that there is a quick and direct process for passengers to enter or exit the vehicle, which is crucial in busy urban environments. Other activities, such as waiting for a parking space, loading commercial goods, or parking, would not be appropriate in these zones because they could lead to longer stops that impede traffic and violate regulations designed to keep these areas clear. Hence, the provision for passenger loading and unloading is a targeted exception to the general rule prohibiting stopping in these zones.