Visibility and Road Hazards — DGT theory test questions

Visibility and Road Hazards is one of the topics tested on the official Spanish DGT theory exam. Work through the questions below in English — each one shows the correct answer and a clear explanation of the rule behind it — then take a full topic test to check you are ready.

32 questions

• Why is visibility one of the most critical factors for road safety?
• Which of the following is NOT a cause of reduced visibility?
• When is a road considered to be insufficiently lit?
• In dense fog, which type of light should NOT be used?
• When driving in heavy rain, which measure is the most appropriate?
• In rain or snow during the day, which lights should you switch on?
• Driving at night on an unlit road with high beams, a vehicle approaches from the front. What should you do?
• In a lit urban area at night, which lights should you generally use?
• To reduce sun glare, which of these measures is correct?
• What is the main purpose of vehicle lights in low-visibility conditions?
• When driving through a tunnel, which lights are mandatory?
• In which case is the use of the rear fog light mandatory?
• When may the front fog light be used?
• In reduced-visibility conditions, what should the safety distance to the vehicle ahead be?
• With visibility limited by fog, which lane is preferable on a multi-lane road?
• In poor-visibility conditions, what kind of manoeuvres should be avoided?
• If you need to stop in the middle of dense fog, what is the correct action?
• What shape and colour are the signs that warn of a hazard on the road?
• The P-29 warning sign warns of:
• You are driving in strong crosswinds and a lorry overtakes you. What effect should you anticipate?
• The P-19 sign warns of a slippery road surface. What should you do when you see it?
• What does the phenomenon of aquaplaning consist of?
• If you feel the vehicle starting to float on the water (aquaplaning), what should you do?
• Why is so-called "black ice" on the road especially dangerous?
• When driving over an area with loose gravel or unexpected potholes, what is the main risk?
• As a general safety rule, at what speed should you drive in relation to visibility?
• On a long, steep descent, what is the correct way to drive?
• Why must you respect the warning and speed-limit signs in hazardous areas?
• If visibility becomes dangerously low and you decide to leave the vehicle, what must you use?
• In an emergency caused by very dense fog, what must you NEVER do?
• When in doubt about visibility or road-surface conditions, what is the safest attitude?
• Hazard perception consists mainly of: