Another vehicle’s lights can tell you in which direction they’re heading and can give you an idea of their speed. Oncoming lights should raise a number of questions in your mind, such as
Examples include a stationary vehicle, a cyclist, a pedestrian, or an unlit skip.
When your headlights are on full beam
If the headlights of oncoming vehicles dazzle you, slow down and, if necessary, stop. Don’t look directly at oncoming headlights.
Don’t retaliate by leaving your lights on full beam and dazzling the oncoming driver.
Dip earlier. Your headlights will cut straight across the eyes of anyone coming towards you. On a right-hand bend this might not happen, or it won’t happen so soon.