You are driving in darkness on a well-constructed main road, using your dipped headlights. Within what distance must you be able to stop?

When driving at night using dipped headlights, you must always be able to stop within the distance you can see clearly illuminated by your headlights. This is because obstacles or hazards may only become visible within this light range. Using main beam headlights allows you to see further, but when you are using dipped headlights—such as when other vehicles are approaching or there is oncoming traffic—the visible distance is shorter, so you must adjust your speed so that you can come to a stop within that illuminated area. This rule helps to prevent accidents caused by not seeing obstacles in time. Side lights do not provide enough illumination to see the road for safe driving. Always match your stopping distance to what you can see, especially at night.