You are driving on a single carriageway with three lanes and there are no road markings or signs giving priority to traffic in either direction. You suddenly see an oncoming vehicle also moving into the centre lane to overtake a slow-moving vehicle ahead. What should you do?

Explanation

On a single carriageway with three lanes where road markings or signs do not give priority, no direction has automatic right of way over the centre lane. The Highway Code (Rule 135) states that drivers must use the middle lane only when it is safe and must be prepared to give way. In an approaching conflict, you should treat this as a potential hazard, slow down, and be ready to return to your normal lane to avoid a head-on collision. Using lights or the horn to claim priority, or accelerating into the hazard, increases risk and does not follow the Code.