The first rule of driving on roads that have no lighting is never drive at a speed where you would be unable to stop within the distance your headlights show to be clear. Standard headlights provide about 30 metres of visibility when dipped and 100 metres on full beam (the length of a football pitch). On an unlit road you should use full beam, however, the moment you see a vehicle, pedestrian or cyclist approaching you must turn your headlights to dip. If you’re driving on a straight level road and see a vehicle approaching, turn your headlights to dip a second after they are able to see you. This shows them that you have gone on to dip, and may remind them to do the same. You should then slow down, as the distance you can see to be clear will be reduced. If no other traffic is approaching, return to full beam as soon as the vehicle has passed you.
Overtaking another vehicle at night can be hazardous. Remember, your view ahead will be limited with bends and dips cloaked in darkness. These can easily hide other road users. Never takes risks. Be certain that the road ahead is clear. Once you have drawn level with the vehicle you are overtaking switch your headlights to full beam if there are no vehicles ahead of you. If a driver overtakes you, then keep your headlights on full beam until they are level with you. The extra light will help them overtake you safely. Once they pull past you turn your headlights to dip until they are gone.