DGT theory test topics › Vehicle Lighting and Visibility
In Spain you must drive with lights on from sunset to sunrise, in tunnels and whenever fog, heavy rain, snow or dust reduce visibility. Motorcycles must use dipped beam at all times, and the rear fog light is only for really bad conditions because it dazzles the drivers behind you.
Key rules to remember
- Dipped beam (luces de cruce): from sunset to sunrise, in tunnels and underpasses, in poor visibility, and when you use a reversible or additional lane against the normal direction of traffic.
- Motorcycles: dipped beam on at any time of day.
- Main beam (luces de carretera): outside built-up areas, at more than 40 km/h, on roads that are not lit enough, and only when you will not dazzle pedestrians or other drivers. Switch to dipped beam when someone comes towards you.
- Rear fog light: only when the weather or the environment is especially unfavourable, such as dense fog, very heavy rain or snow. Switch it off when visibility improves or in a queue.
- Position lights: keep them on when you are stopped or parked on the shoulder of a road without enough lighting.
- Daytime running lights do not replace dipped beam when dipped beam is required.
Exam tip: Many questions show a photo of fog, rain or a tunnel. First decide whether the situation makes lights compulsory, then which lights: dipped beam is the safe answer far more often than fog lights.
Practise: DGT questions about this topic
- The position lights are...
- The traffic light on the right is green and the one on the left is red. If you are in the right lane and want to go straight, what should you do?
- During the day, in dense fog, which lights must you turn on?
- On a day with heavy fog, as shown in the image, which fog lights should you activate if available?
- Which lights should motorcycles use during the day?
The other exam topics
- Traffic Regulations and Road Use
- Manoeuvres and Overtaking
- Traffic Signs and Signals
- Use of the Vehicle
- Driver and Vehicle Documentation
- Accidents and Emergencies
- Road Safety and Behaviour
- Vehicle Mechanics and Maintenance
- Driving Types and Techniques