You are driving in thick fog on a quiet rural road and decide you must stop and park on the road because it is unsafe to continue. What should you do to reduce the risk to other road users?

Explanation

The Highway Code Rule 251 states that it is especially dangerous to park on the road in fog. If it is unavoidable, you must leave your parking lights or sidelights on so other drivers can see your vehicle in time and avoid a collision. Turning all lights off, or relying only on hazards or reflectors, makes your parked vehicle much harder to see in foggy conditions.