When is it obligatory to operate a flashing yellow lamp above the driver’s compartment of a truck?
- Correct answer: When the freight’s width is more than 3 meters.
- When the freight’s width is three meters or less.
- When carrying disposable equipment.
- When the freight’s width is more than 2.80 meters.
Why this is the answer
The correct answer in the official bank: When the freight’s width is more than 3 meters.
A flashing yellow lamp above the cab is required when the freight is wider than 3 meters. Such a wide load takes up much of the road and may stick out beyond the lane, so the flashing light warns other road users from a distance to slow down and keep clear. At 3 meters or less, including 2.80 meters, this duty does not apply, and the type of cargo alone does not trigger it.