How do the drivers of oversized vehicle loads and convoys behave with traffic behind them?

• They don’t give way to the traffic because of their size.
• They don’t allow smaller vehicles to pass but allow larger vehicles to pass.
• Typically, they look for opportunities to allow traffic to pass.
  Explanation:

  "Drivers of oversized vehicle loads and convoys typically look for opportunities to allow traffic to pass."
• It depends on the flow of traffic coming from behind.