When must a vehicle enter a deceleration lane to leave a road?

Explanation
The deceleration lanes found on fast roads such as highways or freeways are used to leave a road and join another accessory road by means of a progressive loss of speed.
We must enter them to leave the road as soon as possible in order to adapt our speed to that of the new road we are entering.
To leave the road and enter the deceleration lane, first signal your intention to change lanes and then pay attention to the lane signs.
Do you want to do the
official exams of the DGT?