What must you ensure when driving a loaded vehicle on the highway?

• The load must be loose to allow for flexibility.
• The load must be able to drop or shift to some extent.
• The load must be securely fastened and not able to drop, shift, leak, or escape.
  Explanation:

  "When driving a loaded vehicle on the highway you must ensure that the load is safely secured in a way that it is not able to drop, shift, leak, or otherwise escape."
• The load must have a tight-fitting cover for visibility.