When driving on a road outside of business or residential areas, what must truck drivers do to ensure the safety of overtaking vehicles?

• Drive close to other trucks.
• Leave enough space for overtaking vehicles.
  Explanation:

  "When traveling on a roadway outside a business or residential district, drivers of trucks and vehicles pulling trailers must leave sufficient space between themselves and other vehicles of the same kind, so that the driver of an overtaking vehicle can enter and occupy the space without danger."
• Drive as fast as possible.
• Stop frequently.