In normal situations, vehicles must overtake on the **left side**. However, there are **exceptions** where overtaking on the **right** is allowed. One of these exceptions occurs when the vehicle you wish to overtake is clearly indicating that it is going to **stop** or change direction to the left. In this case, it is possible to overtake it on the right as an exception.

This is because the vehicle that is stopping or changing direction to the left is leaving free space on its right side, allowing the overtaking to be carried out safely and without violating traffic regulations.