Topic: Traffic signs, markings and signals · Nº 425 / 1397

¿Qué función tienen las guías sonoras situadas en el borde derecho de la calzada, ubicadas normalmente en el arcén coincidiendo con la marca vial que delimita el carril derecho?
What is the purpose of the rumble strips on the right-hand edge of the carriageway, usually placed on the hard shoulder along the road marking that edges the right-hand lane?
- AAlertar al conductor en caso de que se desvíe de la trayectoria de su carril.To alert the driver if they drift out of their lane.
- BBalizar el borde de la calzada, especialmente en condiciones de baja visibilidad.To mark the edge of the carriageway, especially in poor visibility.
- CIndicar la existencia de un carril especial o reservado a determinados vehículos.To show that there is a special lane or a lane reserved for certain vehicles.
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Correct answer
- AAlertar al conductor en caso de que se desvíe de la trayectoria de su carril.To alert the driver if they drift out of their lane.
Rumble strips on the right-hand edge of the carriageway, usually placed on the hard shoulder along the road marking that edges the right-hand lane, are there to alert the driver if they drift out of their lane. These strips, also known as «sound strips», cause vibration and noise when the vehicle's tyres run over them, warning the driver that they are leaving their lane. This helps to prevent accidents, especially in situations of tiredness, distraction or drowsiness at the wheel.
Independent app: not affiliated with or endorsed by the DGT (Spain's Directorate-General for Traffic) or the Ministry of the Interior. The official exam is booked with the DGT and taken at its test centres. The questions here are practice material; the DGT's official question bank is not public.