Where the following traffic sign is placed:

1. All vehicles are permitted to park and wait for passengers.
2. It is permitted to load a maximum of six passengers in each cab.
3. It is forbidden to unload passengers within the boundaries of this sign.
4. Correct answer: All vehicles are permitted to stop for the purpose of passenger unloading.

WhyAt a cab rank any vehicle may stop to drop off a passenger, and only for that. Waiting or standing there is not allowed.