When is a driver obliged to signal?
- When he approaches a level crossing with a barrier.
- Correct answer: When he intends to change his driving lane.
- When he arrives to a long uphill drive.
- When he arrives to a steep descent.
Why this is the answer
The correct answer in the official bank: When he intends to change his driving lane.
Signalling exists to warn other drivers and pedestrians in advance that you are about to change your position or direction, such as changing lanes, turning, pulling out or overtaking. A long uphill drive, a steep descent or a level crossing call for extra care and a suitable speed, but they involve no change of direction, so no signal is required.