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:

  "You must not drive or move any loaded vehicle on the highway if the load is not secure. The load must not be able to drop, shift, leak, or otherwise escape. "
• The load must have a tight-fitting cover for visibility.