When a bus is being passed by another vehicle, the driver should:

When being passed, maintain steady speed and lane position. Slowing slightly is acceptable to help the passing vehicle complete the maneuver, particularly on two-lane roads. Speeding up to prevent the pass is dangerous and aggressive; the passing driver is committed to the maneuver and a sudden speed increase creates a high-speed collision risk. Buses are large and difficult to pass safely; cooperate with passing drivers to keep the time spent in the dangerous adjacent-lane position as short as possible. After the pass is complete, expect the other driver to return to your lane — leave space.