Which of the following locations is parking prohibited?

Parking is prohibited in all of the listed locations due to the potential hazards and inconveniences that such parking can create.

When considering parking in front of a private driveway, it is important to recognize that doing so obstructs access for residents and emergency vehicles, which can lead to significant inconvenience and safety issues.

At taxi stands, parking is prohibited to ensure that taxis can pick up and drop off passengers efficiently. Blocking these designated areas can delay taxi services and create unsafe situations for passengers.

Additionally, in areas where official signs explicitly forbid parking, adhering to those regulations is essential for maintaining order on the roads, preventing traffic congestion, and ensuring the safety of all road users.

Therefore, since all these scenarios highlight specific reasons behind these prohibitions, it's clear that the correct answer encompasses all of them, reflecting the importance of obeying parking regulations in maintaining order and safety on the road.