Question 531 in the bank

What is the meaning of the following traffic sign?

A white-bordered blue square showing white symbols of a tram and a bus, a yellow taxi roof sign reading taxi, and a car beside 4+. Meaning: Designated lane for trams, buses, taxis and vehicles that transport at least the number of passengers that is indicated in the sign.
  1. 4-wheeled vehicles only are permitted to use the roadway or the lane.
  2. Correct answer: Designated lane for trams, buses, taxis and vehicles that transport at least the number of passengers that is indicated in the sign.
  3. All vehicles are permitted to use the roadway or the lane, except for trams and electric buses.
  4. A lane prohibited for public transportation.

Why this is the answer

The correct answer in the official bank: Designated lane for trams, buses, taxis and vehicles that transport at least the number of passengers that is indicated in the sign.

This sign marks a lane reserved for trams, buses, taxis and vehicles carrying at least the number of people shown on the sign, including the driver. Here it shows 4+, so a private car may use the lane only with four or more people on board. The sign does not ban public transport; it gives that lane to public transport.

Topic: Traffic signs. The bank marks it for these classes: Light truck (C1), Heavy truck (C), Bus (D), Motorcycle (A), Tractor (1), Private car (B).