How will you signal your intention to reduce speed considerably?

Correct answer

Repeatedly using the brake light or moving the arm alternately up and down.

To signal your intention to reduce the vehicle's speed considerably, you must repeatedly use the brake light or, if necessary, move your arm alternately up and down with short, rapid movements. Before doing so, it is important to check through the interior mirror the distance and speed of the vehicles travelling behind you, to ensure that they can react in time to your reduction in speed. This procedure alerts the drivers following you to your intention to reduce speed, allowing them to prepare to reduce theirs and avoid a collision. It is especially important to give this warning sufficiently far in advance in situations where a sudden reduction in speed could be unexpected for other drivers.