UK Driving Theory Practice Exam

When is it acceptable to use full beam lights?

1. In heavy traffic

2. When there are no oncoming vehicles

3. At all times to improve visibility

4. In foggy conditions

The correct answer is: When there are no oncoming vehicles

Using full beam lights is acceptable when there are no oncoming vehicles, as this allows you to enhance your visibility and see further down the road without blinding other drivers. Full beam lights provide a brighter and more powerful light that can illuminate the road ahead effectively, which is particularly useful in dark, unlit areas. However, it's crucial to switch back to dipped headlights when there is oncoming traffic or when you are approaching another vehicle, as the glare from full beams can impair the vision of other drivers. In heavy traffic, full beam lights can be blinding and are typically not appropriate. Similarly, using full beams at all times can cause hazards on the road, especially when other vehicles are present. Moreover, in foggy conditions, it's advisable to use fog lights or dipped headlights instead, as full beams can reflect off the fog, reducing visibility even further.