Which of the following vehicles requires chains and flags (perimeter lighting)?
- A vehicle carrying a dust-creating material.
- A vehicle carrying hazardous materials.
- Correct answer: A trailer and a semi-trailer that don’t have a floor and walls.
- A vehicle carrying steel cylinders.
Why this is the answer
The correct answer in the official bank: A trailer and a semi-trailer that don’t have a floor and walls.
A trailer or semi-trailer without a floor and walls has no solid body that shows other drivers where it ends. Chains and flags, or perimeter lighting at night, mark the outline of the vehicle and its load so others can see its width and length. Vehicles carrying hazardous materials, dusty loads or steel cylinders have other requirements, such as warning signs, covering the load or securing it.