In which of the following cases can a bus driver take the middle lane on a three-lane two-way road that is used for traffic in both directions?

Explicación
On a two-way road divided into three lanes, the centre lane may be entered temporarily for overtaking or passing an obstruction and also when preparing a left turn or U-turn. Treating either purpose as the only permitted one omits another lawful temporary use; the lane must not become a normal lane for continuous travel.