Driving in a roundabout is one of the most frequent maneuvers for drivers in Portugal, but many forget a fundamental gesture: using the turn signal. The Road Code determines, through Article 21, that drivers must signal with the necessary advance the intention to change direction or lane, including when preparing to exit a roundabout. This signaling allows other road users to understand where each vehicle intends to go, contributing to safer circulation.
Failure to comply with this obligation can result in fines ranging from €60 to €300. This sanction applies even when the roundabout appears empty, as signaling rules do not depend on the visible presence of other vehicles. However, the infraction by itself does not imply loss of points on the driving license, although other infractions committed in the same situation may have additional consequences.
There is some confusion among drivers about the obligation to keep the left turn signal permanently on while circulating in the roundabout. In reality, the Road Code does not require this practice continuously. The law only requires that lane or direction change maneuvers be signaled, meaning the driver should turn on the left signal when entering, if planning to exit at a non-first exit, and then signal when approaching the right lane before leaving the roundabout.
To correctly exit a roundabout, those intending to use the first exit should occupy the right lane and signal in advance. Those intending to use subsequent exits should travel in the appropriate lane and progressively approach the right after passing the exit immediately before the desired one. The Institute of Mobility and Transport confirms that any lane change within the roundabout must also be properly signaled.
