1. On roads divided into two directions, with a central divider, vehicles must use the lane furthest to the right.
2. On three-lane roads, the centre lane could be for use in both directions, or in only one direction, permanently or temporarily, according to the signage in place, and the lanes to the side are to be used in only one direction, unless the Jefatura Central de Tráfico (Central Traffic Headquarters) or, in each case, the autonomous or local authority responsible for traffic, establishes for these lanes or some of these lanes to be used in another direction, which would need to be appropriately marked.
3. Drivers of vehicles moving in the opposite direction to that stipulated will be considered to have committed a very serious infraction.