When is it mandatory to operate a yellow flashing light above the driver's cab on a truck?
Pick an answer to test yourself
The correct answer: When the width of the load is more than three metres.
A yellow flashing light above the driver's cab on a truck is mandatory when the width of the load is more than three metres. A load of 2.80 metres, or exactly three metres or less, does not require it, and nor does perishable equipment.
This question appears in the theory test for license:C · heavy truck
